User:Namayan/sandbox/4A

Luzon

Ilocos Norte

Legal Basis	Effective Date	Local government units	Actions	Statistics
	1580	Laoag	parish founded by Agustinians
	1584	San Nicolas	founded by Agustinians
	1593	Paoay	parish founded by Agustinians
	1724	San Miguel	• 1586 — founded as visita of Laoag • 1724 — founded as independent parish
	1770	Piddig	established as a parish
	1784	Pasuquin	founded as a parish
	1786	Bangui
	1788	Solsona
	1866	Nagpartian
Act 207	1901-08-20		Ilocos Norte organized under Act 83
Act 946	1903-10-15	Bangui, Nagpartian, Pasuquin, Bacarra, Vintar, Laoag, San Nicolas, San Miguel, Piddig, Dingras, Solsona, Paoay, Batac, Banna, Badoc	reduced 15 municialities to 10: • Nagpartian merged into Bangui • Vintar merged into Bacarra • San Nicolas merged into Laoag • Solsona merged into Dingras • Banna merged into Batac	10 municipalities
EO 35 (1908)	1909-01-01	Vintar	separated from Bacarra	11 municipalities
EO 101 (1908)		San Nicolas	separated from Laoag	12 municipalities
EO 135 (1909)	1910-01-01	Solsona	separated from Dingras	13 municipalities
EO 87 (1912)	1913-01-01	Nagpartian	separated from Bangui	14 municipalities
EO 94 (1912)		Banna	separated from Batac	15 municipalities
Act 2390	1914-02-28	Burgos	renamed from Nagpartian
		Sarrat	renamed from San Miguel
EO 66 (1916)	1916-07-01	Township of Nueva Era	various settlements organized into township
EO 34 (1919)	1919-03-05	Nueva Era	converted from township	16 municipalities
EO 36 (1919)		Municipal districts of Adams, Dumalneg, Carasi	converted from settlements	16 municipalities 3 municipal districts
EO 92 (1919)	1920-01-01	Pinili	separated from Badoc, Paoay, Batac	17 municipalities 3 municipal districts
EO 59 (1920)	1921-01-01	Currimao	separated from Paoay	18 municipalities 3 municipal districts
EO 13 (1954)	1954-02-14	Pagudpud	separated from Bangui	19 municipalities 3 municipal districts
RA 3753	1963-06-22	Marcos	renamed from Dingras	20 municipalities 3 municipal districts
RA 3997	1964-06-18	Espiritu	renamed from Banna
RA 4584	1965-06-19	City of Laoag	converted from municipality	1 city 19 municipalities 3 municipal districts
EO 184 (1969)	1968-07-01	Dumalneg	converted from municipal district	1 city 20 municipalities 2 municipal districts
BP 337§136, Proc 2289 (1983)	1983-05-16	Adams, Dumalneg, Carasi	converted from municipal districts	1 city 22 municipalities
SP Res. 120-95	1996-03-16	Banna	renamed from Espiritu
RA 9407	2007-06-23	City of Batac	converted from municipality	2 cities 21 municipalities

La Union

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 203	1901-08-15		La Union organized under Act 83
Act 662	1903-03-05	rancheria of Galiano	annexed rancheria of Galiano
Act 935	1903-10-09	Aringay, Caba, Galiano, Rosario, Santo Tomas, Agoo, Bacnotan, Balaoan, Bangar, Bauang, Naguilian, Namacpacan, San Fernando, San Juan, Tubao	reduced 15 municipalities to 12: • Caba, Galiano merged into Aringay • Santo Tomas merged into Rosario	12 municipalities
Act 1003	1903-11-21	Rosario, Santo Tomas	amended Act 935
EO 41 (1907)	1908-01-01	Caba	separated from Aringay	14 municipalities
		Rosario	separated from Santo Tomas
Act 1543	1906-10-18	Luna	renamed from Namacpacan
Act 3386, EO 72 (1947)	1947-07-30	municipalities of Sudipen, San Gabriel, Pugo	converted from municipal districts	17 municipalities
Act 3386, EO 214 (1949)	1949-04-30	municipality of Santol	converted from municipal district	18 municipalities
EO 42 (1963)	1962-07-01	municipality of Bagulin, Burgos	converted from municipal districts	20 municipalities
RA 8509	1998-03-20	City of San Fernando	converted from municipality	1 city 19 municipalities

Pangasinan

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 86	1901-02-16		Pangasinan organized under Act 83
		Umingan, Rosales, San Quintin, Balungao	annexed from Nueva Ecija
Act 252	1901-10-02	La Villanueva	merged into Bautista
Act 332	1902-01-21	Mapandan	separated from Mangaldan
Act 931	1903-10-08	Sual, San Isidro, Salasa, Aguilar, Mangatarem, Urbiztondo, Lingayen, Binmaley, Dagupan, Mangaldan, Mapandan, Manaoag, San Jacinto, San Fabian, Alava, Binalonan, Urdaneta, Pozorrubio, Asingan, San Manuel, Calasiao, Santa Barbara, San Carlos, Malasiqui, Bayambang, Bautista, Alcala, Santo Tomas, Villasis, Rosales, Balungao, Tayug, Santa Maria, San Nicolas, Natividad, Umingan, San Quintin	reduced the 37 municipalities to 25: • San Isidro merged into Sual • Aguilar merged into Salasa • Urbiztondo merged into Mangatarem • Mapandan merged into Mangaldan • San Jacinto merged into Manaoag • Alava merged into San Fabian • San Manuel merged into Asingan • Santa Barbara merged into Calasiao • Santo Tomas merged into Alcala • Balungao merged into Rosales • Santa Maria merged into Tayug • Natividad merged into San Nicolas	25 municipalities
Act 1004	1904-01-01	Alaminos, Bolinao, San Isidro, Infanta	annexed from Zambales	29 municipalities
Act 1029		Anda, Bani, Agno		32 municipalities
Act 1556	1906-10-31	Aguilar	separated from Salasa	41 municipalities
		Alava	separated from San Fabian
		Balungao	separated from Rosales
		Natividad	separated from San Nicolas
		Santa Barbara	separated from Calasiao
		Santa Maria	separated from Tayug
		San Manuel	separated from Asingan
		San Jacinto	separated from Manaoag
		Urbiztondo	separated from Mangatarem
EO 6 (1908)	1909-01-01	San Isidro Labrador	• separated from Sual • renamed from San Isidro	42 municipalities
EO 10 (1908)		Mapandan	separated from Mangaldan	43 municipalities
EO 12 (1908)		Santo Tomas	separated from Alcala	45 municipalities
		Balincaguin*	separated from San Isidro de Potot
EO 84 (1910)	1911-01-01	Dasol*	separated from San Isidro de Potot	46 municipalities
EO 109 (1913)	1914-01-01	Townships of Esperanza, Labayug, Township of Artacho	Townships of Esperanza, Labayug merged to form Township of Artacho
Act 2390	1914-02-28	Labrador	renamed from San Isidro Labrador
		Burgos	renamed from San Isidro de Potot
EO 12 (1918)	1918-03-25	Alava, Township of Artacho,	merged into Sison
Act 3127	1924-02-27	Bugallon	renamed from Salasa
Act 3552	1929-11-23	Mabini	renamed from Balincaguin
RA 170	1947-06-20	City of Dagupan	converted from Mun of Dagupan	1 city 45 municipalities
EO 446 (1961), RA 4866	1961-09-17	Basista	separated from San Carlos, Bayambang, Malasiqui	1 city 46 municipalities
RA 4487	1966-01-01	City of San Carlos	converted from Mun of San Carlos	2 cities 45 municipalities
RA 6485	1980-03-05	Laoac	separated from Manaoag	2 cities 46 municipalities
RA 8480	1998-03-20	City of Urdaneta	converted from Mun of Urdaneta	3 cities 45 municipalities
RA 9025	2001-03-28	City of Alaminos	converted from Mun of City of Alaminos	4 cities 44 municipalities

Zambales

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 211	1901-08-28		Zambales organized under Act 83
Act 945	1903-10-15	Alaminos, Alos, Bolinao, Zaragoza, San Isidro, Balincaguin, Dasol, Santa Cruz, Infanta, Masinloc, Candelaria, Iba, Palauig, Botolan, Cabangan, San Marcelino, Castillejos, San Antonio, San Narciso, San Felipe, Anda, Agno, Bani, Olongapo, Subic	reduced 25 municipalities to 15: • Alos merged into Alaminos • Zaragoza merged into Bolinao • Balincaguin, Dasol merged into San Isidro • Candelaria merged ito Masinloc • Palauig merged into Iba • Cabangan merged into Botolan • Castillejos, San Antonio merged into San Marcelino • San Felipe merged into San Narciso	15 municipalities
Act 1004	1904-01-01	Alaminos, Bolinao, San Isidro, Infanta	annexed to Pangasinan	11 municipalities
Act 1029		Anda, Bani, Agno		8 municipalities
EO 51 (1907)	1908-01-01	Cabangan	separated from Botolan	9 municipalities
EO 1 (1908)	1908-03-01	San Felipe	separated from San Narciso	10 municipalities
EO 7 (1908)	1909-01-01	San Antonio	separated from San Marcelino	11 municipalities
EO 57 (1909)	1910-01-01	Castillejos	separated from San Marcelino	14 municipalities
		Palauig	separated from Iba
		Candelaria	separated from Masinloc
EO 11 (1912)	1912-04-01	Olongapo	merged into Subic	13 municipalities
EO 366 (1959)	1960-04-29	Olongapo	created from acquired territory	14 municipalities
RA 4645	1966-06-01	City of Olongapo	converted from Mun of Olongapo	1 city 13 municipalities

Tarlac

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 87	1901-02-18		Tarlac organized under Act 83
Act 930	1903-10-08	Tarlac, Murcia, Moriones, La Paz, Concepcion, Capas, O'Donnell, Paniqui, Anao, Moncada, Camiling, Santa Ignacia, San Clemente, Pura, Gerona, Bamban, Victoria	reduced 17 municipalities to 9: ● Murcia (1/3 part), Moriones, La Paz (1/2 part) merged into Tarlac ● La Paz (2/2 part), Murcia (2/3 part) merged into Concepcion ● O'Donnell, Murcia (3/3 part) merged into Capas ● Anao merged into Paniqui ● Santa Ignacia, San Clemente merged into Camiling ● Gerona merged into Pura
Act 1555, Act 1584	1906-10-30	La Paz	separated from Tarlac, Concepcion	10 municipalities
Act 1623	1907-03-27	Gerona	separated from Pura	11 municipalities
EO 25 (1908)	1908-06-01	Anao	separated from Paniqui	13 municipalities
		San Manuel	separated from Moncada
EO 105 (1913)	1914-01-01	Santa Ignacia	separated from Camiling	14 municipalities
EO 131 (1914)	1915-01-01	San Clemente	separated from Camiling	15 municipalities
EO 96 (1916)	1917-01-01	Mayantoc	separated from Camiling	16 municipalities
EO 60 (1920)	1921-01-01	Ramos	separated from Paniqui Seat of govt: Bo. Bani	17 municipalities
RA 6842	1990-04-21	San Jose	separated from Tarlac	18 municipalities
RA 8593	1998-04-18	City of Tarlac	converted from municipality	1 city, 17 municipalities

Nueva Ecija

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 86	1901-02-16	Umingan, Rosales, San Quintin, Balungao	annexed to Pangasinan
Act 139	1901-06-11		Nueva Ecija organized under Act 83, capital at San Isidro
Act 933	1903-10-08	Nampicuan, Cuyapo, Aliaga, Zaragoza, San Antonio, Jaen, San Isidro, Cabiao, Peñaranda, San Leonardo, Cabanatuan, Santa Rosa, Talavera, Santo Domingo, San Jose, Lupao, San Juan de Guimba, Licab, Gapan, Bongabon, Puncan, Carranglan, Pantabangan	reduced 23 municipalites to 15 • Cuyapo merged into Nampicuan • Zaragoza merged into Aliaga • Jaen merged into San Antonio • Cabiao merged into San Isidro • San Leonardo merged into Peñaranda • Santa Rosa merged into Cabanatuan • Santo Domingo merged into Talavera • Lupao merged into San Jose	15 municipalities
Act 948	1903-10-19	Nampicuan, Cuyapo	Nampicuan merged into Cuyapo	15 municipalities
Act 1232	1904-09-12	Puncan	merged into San Jose	14 municipalities
Act 1687	1907-08-17	Santa Rosa	separated from Cabanatuan	15 municipalities
Act 1717	1907-09-20	Nampicuan	separated from Cuyapo	21 municipalities
		Zaragoza	separated from Aliaga
		Jaen	separated from San Antonio
		Cabiao	separated from San Isidro
		San Leonardo	separated from Peñaranda
		Santo Domingo	separated from Talavera
Act 2390	1914-02-28	Guimba	renamed from San Juan de Guimba
EO 57 (1912)	1912-10-01		Capital transferred from San Isidro to Cabanatuan
EO 22 (1912)	1913-01-01	Lupao	separated from San Jose	22 municipalities
EO 25 (1912)	1913-01-01	Rizal	separated from Bongabon Seat of govt: n.a.	23 municipalities
EO 72 (1912)	1913-01-01	Muñoz	separated from San Juan de Guimba, Santo Domingo, Talavera Seat of govt: Bo. Muñoz	24 municipalities
EO 89 (1915)	1916-01-01	Quezon	separated from Aliaga Seat of govt: Bo. Santo Niño	25 municipalities
EO 98 (1916)	1917-01-01	Laur	separated from Bongabon Seat of govt: Bo. San Esteban	26 municipalities
EO 39 (1920)	1921-01-01	Papaya	separated from Peñaranda	27 municipalities
EO 113 (1947)	1948-01-01	Talugtug	separated from Guimba, Muñoz, Cuyapo, Lupao Seat of govt: Bo. San Isidro (Talugtug)	28 municipalities
RA 496	1950-06-12	Bitulok	separated from Laur Seat of govt: Bo. Bitulok	29 municipalities
RA 526	1950-06-16	City of Cabanatuan	converted from municipality	1 city 28 municipalities
RA 949	1953-06-20	Sabani	renamed from Bitulok
RA 1221	1955-05-11	Llanera	separated from San Jose, Talavera, Rizal Seat of govt: Bo. Bagumbayan	1 city 29 municipalities
RA 1318	1955-06-16	Gabaldon	renamed from Sabani
RA 1665	1957-06-20	General Tinio	renamed from Papaya
RA 1863	1957-06-22	General Mamerto Natividad	separated from Cabanatuan City Seat of govt: Bo. Bapang Kawayan	1 city 30 municipalities
RA 4475	1965-12-05	City of Palayan	• separated from (Laur, Bongabon) • capital transferred from Cabanatuan to City of Palayan	2 cities 30 municipalities
RA 6051	1969-08-10	San Jose City	converted from municipality	3 cities 29 municipalities
RA 8977	2000-12-20	Science City of Muñoz		4 cities 28 municipalities
RA 9022	2001-08-25	City of Gapan		5 cities 27 municipalities

Bulacan

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 88	1901-02-27		Bulacan organized under Act 83 Capital: Malolos
Act 932	1903-10-08	Malolos, Barasoain, Santa Isabel, Hagonoy, Calumpit, Quingua, Pulilan, Baliuag, San Rafael, Bustos, San Miguel, San Ildefonso, Angat, Norzagaray, Polo, Obando, Santa Maria, San Jose, Meycauayan, Marilao, Bigaa, Bocaue, Bulacan, Guiguinto, Paombong	reduced 25 municipalities to 13: • Barasoain, Santa Isabel merged into Malolos • Pulilan merged into Quingua • San Rafael, Bustos merged into Baliuag • San Ildefonso merged into San Miguel • Norzagaray merged into Angat • Obando merged into Polo • San Jose merged into Santa Maria • Marilao merged into Meycauayan • Bocaue merged into Bigaa • Guiguinto merged into Bulacan	13 municipalities
Act 1002	1903-11-20	Bigaa, Bocaue	amended Act 932, restored Bocaue, merged Bigaa into Bocaue
Act 1588	1907-08-10	Obando	separated from Polo	14 municipalities
Act 1619	1907-08-10	San Rafael	separated from Baliuag	15 municipalities
EO 5 (1908)	1908-06-01	Norzagaray	separated from Angat	16 municipalities
EO 116 (1908)	1909-01-01	Pulilan	separated from Quingua	18 municipalities
		San Ildefonso	separated from San Miguel
EO 80 (1911)	1912-01-01	Bigaa	separated from Bocaue	19 municipalities
EO 116 (1914)	1915-01-01	Marilao	separated from Meycauayan	20 municipalities
EO 126 (1914)		Guiguinto	separated from Bulacan	21 municipalities
EO 90 (1916)	1917-01-01	Bustos	separated from Baliuag	22 municipalities
EO 100 (1917)	1918-01-01	San Jose del Monte	separated from Santa Maria	23 municipalities
CA 26	1936-09-08	Plaridel	renamed from Quingua
EO 106 (1946)	1946-04-17	Pandi	separated from Bigaa Seat of govt: Bo. Pandi	24 municipalities
EO 401 (1960)	1960-07-28	Valenzuela	separated from Polo Seat of govt: Bo. Karuhatan	25 municipalities
EO 46 (1963)	1963-09-11	Polo	merged into Valenzuela Seat of govt: Bo. Karuhatan	24 municipalities
RA 4702	1966-06-18	Balagtas	renamed from Bigaa
PD 824	1975-11-07	Valenzuela	annexed to Metropolitan Manila	23 municipalities
PD 1196	1977-09-13	Doña Remedios Trinidad	separated from Angat, Bulacan, San Miguel Seat of govt: Brgy. Pulong Sampaloc	24 municipalities
RA 8754	1999-12-18	City of Malolos	converted from municipality	1 city, 23 municipalities
RA 8797	2000-09-10	City of San Jose del Monte		2 cities, 22 municipalities
RA 9356	2006-12-10	City of Meycauayan		3 cities, 21 municipalities
RA 11929	2023-01-14	City of Baliwag		4 cities, 20 municipalities

Pampanga

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 85	1901-02-13		Pampanga organized under Act 83 Capital: Bacolor
Act 943	1903-10-15	Arayat, Santa Ana, Bacolor, Santa Rita, Guagua, Betis, Macabebe, San Miguel, Santo Tomas, Minalin, San Luis, San Simon, Apalit, Angeles, Candaba, Flordiablanca, Lubao, Mexico, Mabalacat, Magalang, Porac, Sexmoan, San Fernando	reduced 23 municipalities to 17: • Santa Ana merged into Arayat • Santa Rita merged into Bacolor • Betis merged into Guagua • San Miguel merged into Macabebe • Minalin merged into Santo Tomas • San Simon merged into San Luis	17 municipalities
Act 982	1903-11-06	Sexmoan	amended Act 943 • Sexmoan merged into Guagua	16 municipalities
Act 1009	1903-11-25	Santa Rita	amended Act 943, as amended • separated from Bacolor	17 municipalities
Act 1204	1904-08-15		Capital transferred to San Fernando
Act 1208	1904-07-26	Santo Tomas	Santo Tomas merged into San Fernando	16 municipalities
Act 1719	1907-09-20	Masantol	separated from Macabebe, renamed from San Miguel	18 municipalities
		San Simon	separated from San Luis
EO 122 (1908)	1909-01-01	Sexmoan	separated from Guagua	19 municipalities
EO 7 (1909)	1909-02-01	Minalin	separated from San Fernando	20 municipalities
EO 17 (1912)	1913-01-01	Santa Ana	separated from Arayat	21 municipalities
EO 476 (1951)	1951-10-12	Santo Tomas	separated from San Fernando	22 municipalities
RA 3700	1964-01-01	City of Angeles	converted from municipality	1 city 21 municipalities
RA 8990	2001-02-03	City of San Fernando	converted from municipality	2 cities 20 municipalities
RA 10164	2012-07-21	Mabalacat City	converted from municipality	3 cities 19 municipalities
Mun Ord 66 (2021)		Sto. Tomas	renamed from Santo Tomas

Bataan

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 92	1901-03-02		Bataan organized under Act 83
Act 957	1903-10-23	Dinalupihan, Hermosa, Orani, Samal, Abucay, Mabatang, Balanga, Pilar, Orion, Mariveles, Bagac, Moron	reduced 12 municipalities to 8: • Hermosa merged into Dinalupihan • Samal merged into Orani • Mabatang merged into Abucay • Pilar merged into Balanga	8 municipalities
EO 9 (1908)	1909-01-01	Pilar	separated from Balanga	9 municipalities
EO 19 (1908)	1909-01-01	Samal	separated from Orani	10 municipalities
EO 124 (1908)	1909-01-01	Hermosa	separated from Dinalupihan	11 municipalities
EO 82 (1913)	1914-01-01	Dinalupihan, Hermosa, Bagumbayan	Dinalupihan, Hermosa merged into Bagumbayan	10 municipalities
EO 93 (1916), EO 92 (1917)	1917-01-01	Limay	separated from Orion	11 municipalities
EO 1 (1918)	1918-01-01	Bagumbayan, Dinalupihan, Hermosa	Bagumbayan divided into Dinalupihan, Hermosa	12 municipalities
RA 1249	1955-06-10	Morong	renamed from Moron
RA 8984	2000-12-30	City of Balanga	converted from muncipality	1 city 12 municipalities

Metro Manila/Greater Manila/Manila

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 183	1901-07-31	City of Manila
City of Greater Manila
EO 400 (1942)	1942-01-01	Caloocan, Makati, Mandaluyong, Parañaque, Pasay	separated from Rizal to form City of Greater Manila
EO 58 (1945)	1942-08-01	Caloocan, Makati, Mandaluyong, Parañaque, Pasay	reverted to Rizal
Metropolitan Manila
PD 824	1975-11-07	Manila		4 cities 13 municipalities
		Quezon City, Pasay City, City of Caloocan, Makati, Mandaluyong, San Juan, Las Piñas, Malabon, Navotas, Pasig, Pateros, Parañaque, Marikina, Muntinlupa, Taguig	separated from Rizal to form Metropolitan Manila
		Valenzuela	separated from Bulacan to form Metropolitan Manila
RA 7675	1994-04-10	City of Mandaluyong	converted from municipality	5 cities 12 municipalities
RA 7829	1995-01-21	City of Pasig		6 cities 11 municipalities
RA 7854	1995-02-04	City of Makati		7 cities 10 municipalities
RA 7926	1995-05-08	City of Muntinlupa		8 cities 9 municipalities
RA 7926	1996-12-07	City of Marikina		9 cities 8 municipalities
RA 8251	1997-03-26	City of Las Piñas		10 cities 7 municipalities
RA 8507	1998-03-22	City of Parañaque		11 cities 6 municipalities
RA 8526	1998-12-30	City of Valenzuela		12 cities 5 municipalities
RA 9019	2001-04-21	City of Malabon		13 cities 4 municipalities
RA 8487	2004-12-08	City of Taguig		14 cities 3 municipalities
RA 9387	2007-06-24	City of Navotas		15 cities 2 municipalities
RA 9388	2007-06-16	City of San Juan		16 cities 1 municipality

Rizal

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 137	1901-06-11		Province of Manila, District of Morong merged to form province of Rizal under Act 83
Act 183	1901-07-31	Tondo, Binondo, Santa Cruz, Quiapo, San Miguel, Sampaloc, Ermita, Malate, Paco, Pandacan	annexed to City of Manila
Act 227	1901-09-06	Pasay	renamed from Pineda
Act 341	1902-01-29	Santa Ana	annexed to City of Manila
Act 942	1903-10-12	Pasig, Marikina, San Mateo, Montalban, Pateros, Taguig, Muntinlupa, Pasay, Malibay, Parañaque, Las Piñas, Caloocan, Novaliches, Malabon, Navotas, San Felipe Neri, San Juan, San Pedro Macati, Taytay, Cainta, Angono, Antipolo, Bosoboso, Teresa, Morong, Binangonan, Baras, Cardona, Tanay, Pililla, Quisao, Jalajala	Reduced 32 municipalities to 15: • Montalban merged into San Mateo • Taguig, Muntinlupa merged into Pateros • Malibay merged into Pasay • Las Piñas merged into Parañaque • Novaliches merged into Caloocan • Navotas merged into Malabon • San Juan del Monte merged into San Felipe Neri • Cainta, Angono merged into Taytay • Bosoboso, Teresa merged into Antipolo • Binangonan, Baras, Cardona merged into Morong • Quisao, Jalajala merged into Pililla	15 municipalities
Act 984	1903-11-06	Binangonan	• separated from Morong • fmr mun of Angono transferred from Taytay to Binangonan	16 municipalities
Act 1008	1903-11-25		fmr mun Muntinlupa transferred from Pateros to Biñan, La Laguna
Act 1308	1905-03-22	PaterosTaguig	• fmr mun of Muntinlupa transfered from Biñan, La Laguna to Taguig • renamed from Pateros • fmr mun Pateros, Muntinlupa merged into Taguig
Act 1442	1906-01-17	Navotas	• separated from Malabon • fmr mun Baras transferred from Morong to Tanay	17 municipalities
Act 1625	1907-08-10	San Juan del Monte	separated from San Felipe Neri	19 municipalities
		Las Piñas	separated from Parañaque
Act 1720	1907-09-20	Jalajala	separated from Pililla	20 municipalities
EO 20 (1908)	1909-01-01	Pateros	separated from Taguig	22 municipalities
		Montalban	separated from San Mateo
EO 107 (1913)	1914-01-01	Cainta	separated from Taytay	23 municipalities
EO 6 (1914)	1914-02-01	Cardona	separated from Morong	24 municipalities
Act 2390	1914-02-28	Makati	renamed from San Pedro Macati
EO 108 (1917)	1918-01-01	Muntinlupa	separated from Taguig	25 municipalities
EO 57 (1918)	1919-01-01	Teresa	separated from Antipolo	26 municipalities
EO 57 (1920)	1921-01-01	Baras	separated from Tanay	27 municipalities
Act 3836	1931-11-06	Mandaluyong	renamed from San Felipe Neri
EO 158 (1938) RA 6469	1939-01-01 1972-06-12	Angono	separated from Binangonan	28 municipalities
CA 502	1939-10-12	Quezon City	(separated from Caloocan, San Juan, Marikina, Mandaluyong, Pasig)	1 chartered city 28 municipalities
EO 400 (1942)	1942-01-01	Caloocan, Makati, Mandaluyong, Parañaque, Pasay	separated to form City of Greater Manila
EO 58 (1945)	1945-08-01	Caloocan, Makati, Mandaluyong, Parañaque, Pasay	reverted from City of Greater Manila
RA 183	1947-06-21	Rizal City	converted, renamed from municipality of Pasay	2 chartered cities 27 municipalities
RA 437	1950-06-07	Pasay City	renamed from Rizal City
RA 3278	1962-02-16	City of Caloocan	converted from municipality	3 chartered cities 26 municipalities
PD 824	1975-11-07	Quezon City, Pasay City, Caloocan City, Makati, Mandaluyong, San Juan, Las Piñas, Malabon, Navotas, Pasig, Pateros, Parañaque, Marikina, Muntinlupa, Taguig	separated to form Metropolitan Manila	14 municipalities
BP 275	1982-11-12	Rodriguez	renamed from Montalban
RA 8508	1998-04-04	City of Antipolo	converted from municipality	1 component city 13 municipalities
RA 11812	2022-	Montalban	renamed from Rodriguez

Cavite

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 138	1901-06-11		Cavite organized under Act 83
Act 423	1902-06-23	Lubang, Looc	annexed to province of Marinduque
Act 707	1903-03-28	San Roque, La Caridad	merged into Cavite
Act 947	1903-10-15	Cavite, San Roque, La Caridad, Noveleta, Cavite Viejo, Rosario, San Francisco de Malabon, Santa Cruz de Malabon, Imus, Bacoor, Perez-Dasmariñas, Carmona, Silang, Amadeo, Indang, Alfonso, Mendez-Nuñes, Bailen, Naic, Ternate, Maragondong, Magallanes, Isla de Corregidor	Reduced 23 municipalities to 11 • San Roque, La Caridad merged into Cavite • Cavite Viejo, Rosario merged into Noveleta • Santa Cruz de Malabon merged into San Francisco de Malabon • Bacoor, Perez-Dasmariñas merged into Imus • Amadeo merged into Silang • Mendez-Nuñes, Bailen merged into Alfonso • Ternate merged into Alfonso • Magallanes merged into Maragondong	11 municipalities
Act 1551	1906-10-25	Bacoor	separated from Imus	12 municipalities
Act 1718	1907-09-20	Kawit	• separated from Noveleta • renamed from Cavite Viejo	13 municipalities
EO 120 (1919)	1910-01-01	Tanza	separated from San Francisco de Malabon	14 municipalities
EO 124 (1909)	1910-01-01	Isla de Corregidor	merged into Cavite	13 municipalities
EO 92 (1910)	1911-01-01	Rosario	separated from Noveleta	14 municipalities
Act 2390	1914-02-28	Malabon	renamed from San Francisco de Malabon
		Tanza	renamed from Santa Cruz de Malabon
EO 8 (1914)	1915-01-01	Amadeo	separated from Silang	15 municipalities
EO 115 (1914)	1915-01-01	Bailen	separated from Alfonso	16 municipalities
EO 125 (1914)	1915-01-01	Mendez-Nuñez	separated from Alfonso	17 municipalities
EO 85 (1915)	1916-01-01	Magallanes	separated from Maragondon	18 municipalities
EO 90 (1915)	1916-01-01	Ternate	separated from Naic	19 municipalities
EO 101 (1916)	1907-01-01	Dasmariñas	separated from Imus	20 municipalities
Act 2889	1920-02-24	General Trias	renamed from Malabon
CA 547	1940-05-26	City of Cavite	converted from Mun of Cavite	1 city 19 municipalities
CA 338, CA 397, RA 1418	1938-06-21	City of Tagaytay	separated from (Mendez, Silang, Amadeo)	2 cities 19 municipalities
EO 639 (1953)	1953-11-05	Amaya	separated from Tanza Seat of govt: Bo. Amaya	2 cities 20 municipalities
EO 6 (1954)	1954-01-07	Amaya	merged into Tanza	2 cities 19 municipalities
RA 981, RA 1912	1954-05-24	City of Trece Martires	separated from (Tanza, Indang, General Trias)	3 cities 19 municipalities
RA 4346	1965-06-19	General Emilio Aguinaldo	renamed from Bailen
BP 75	1981-01-10	General Mariano Alvarez	separated from Carmona Seat of govt: Brgy. San Gabriel	3 cities 20 municipalities
RA 9723	2009-10-15	City of Dasmariñas	convered from municipality	4 cities 19 municipalities
RA 10160	2012-04-10	City of Bacoor		5 cities 18 municipalities
RA 10161	2012-04-10	City of Imus		6 cities 17 municipalities
RA 10675	2015-08-19	City of General Trias		7 cities 16 municipalities

Laguna

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 424	1902-07-01		La Laguna organized under Act 83
Act 939	1903-10-12	Mabitac, Santa Maria, Siniloan, Famy, Pangil, Paete, Paquil, Longos, San Antonio, Luisiana, Cavinti, Nagcarlan, Rizal, San Pablo, Alaminos, Bay, Los Baños, Biñan, San Pedro Tunasan, Pagsanjan, Lumban, Majayjay, Magdalena, Lilio, Santa Cruz, Pila, Calauan, Cabuyao, Calamba, Santa Rosa	reduced 30 municipalities to 19: • Santa Maria merged into Mabitac • Famy, Pangil merged into Siniloan • Paquil, Longos, San Antonio merged into Paete • Cavinti merged into Luisiana • Rizal merged into Nagcarlan • Alaminos merged into San Pablo • Los Baños merged into Bay • San Pedro Tunasan merged into Biñan	19 municipalities
Act 1008	1903-11-03	Pangil	amending Act 939: • separated Pangil from Siniloan • separated Paquil from Paete • merged Paquil into Pangil	20 municipalities
		Bay, Los Baños	• reestablished Los Baños • merged Bay into Los Baños
			fmr municipality of Muntinlupa, Rizal annexed to Biñan
Act 1308	1905-03-22		fmr municipality of Muntinlupa annexed from Biñan to Taguig, Rizal
Act 1553	1906-10-29	San Pedro de Tunasan	separated from Biñan	21 municipalities
Act 1690	1907-09-15	Alaminos	separated from San Pablo	22 municipalities
Act 1712	1907-09-12	Cavinti	separated from Luisiana	23 municipalities
EO 42 (1908)	1909-01-01	Longos	• merged fmr municipalities of Longos, San Antonio • separated from Paete	24 municipalities
EO 50 (1908)	1909-07-01	Bay	separated from Los Baños	25 municipalities
EO 72 (1909)	1910-01-01	Famy	separated from Siniloan	27 municipalities
		Santa Maria	separated from Mabitac
Act 2390	1914-02-28	San Pedro	renamed from San Pedro de Tunasan
EO 58 (1918)	1919-01-01	Rizal	separated from Nagcarlan	28 municipalities
EO 77 (1927)	1927-10-01	Pakil	separated from Pangil	29 municipalities
CA 520	1940-05-07	City of San Pablo	converted from municipality	1 city, 28 municipalities
EO 282 (1949)	1949-10-14	Victoria	separated from Pila Seat of govt: Bo. Nanhaya & San Roque	1 city, 29 municipalities
Act 1417	1956-05-17	Kalayaan	renamed from Longos
Mun Council Res 38-S-65	1965-06-11	Liliw	renamed from Lilio
RA 9024	2001-04-21	City of Calamba	converted from municipality	2 cities, 28 municipalities
RA 9264	2004-07-10	City of Santa Rosa		3 cities, 27 municipalities
RA 9740	2010-02-02	City of Biñan		4 cities, 26 municipalities
RA 10163	2012-08-04	City of Cabuyao		5 cities, 25 municipalities

Batangas

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 126	1901-05-02		Batangas organized under Act 83
Act 708	1903-03-28		reduced 13 municipalities to 5: • Calatagan, Tuy, Calaca merged into Balayan • Lian merged into Nasugbu • Talisay merged into Tanauan • Lobo merged into Taysan • Lemery, San Luis merged into Taal
Act 958	1903-10-23	Balayan, Tuy, Calatagan, Calaca, Taal, Lemery, San Luis, Rosario, Taysan, Tanauan, Talisay, Batangas, Bauan, Cuenca, Ibaan, Lian, Lipa, Lobo, Nasugbu, San Jose, San Juan de Bocboc, Santo Tomas	repealed Act 708, reduced 22 municipalities to 16: • Tuy, Calatagan merged into Balayan • Lemery, San Luis merged into Taal • Taysan merged into Rosario • Talisay merged into Tanauan	16 municipalities
Act 977	1903-11-03	Lian	merged into Nasugbu	15 municipalities
Act 1514	1906-07-23	Talisay	separated from Tanauan	16 municipalities
Act 1549	1906-10-25	Lemery	separated from Taal	17 municipalities
EO 43 (1909)	1910-01-01	Alitagtag	separated from Bauan	18 municipalities
EO 85 (1910)	1911-01-01	Tuy	separated from Balayan	19 municipalities
EO 78 (1911)	1912-01-01	Calatagan	separated from Balayan	20 municipalities
Act 2390	1914-02-28	Bolbok	renamed from San Juan de Bocboc
EO 127 (1914)	1915-01-01	Lian	separated from Nasugbu	21 municipalities
EO 85 (1917)	1918-01-01	Mabini	separated from Bauan Seat of govt: Bo. Polong Niogan	22 municipalities
EO 4 (1918)		San Luis	separated from Taal	23 municipalities
EO 43 (1918)	1919-01-01	Taysan	separated from Rosario	24 municipalities
EO 56 (1918)		Malvar	separated from Lipa Seat of govt: Bo. Luta	25 municipalities
EO 308 (1931)	1932-01-01	Mataasnakahoy	separated from Lipa Seat of govt: n.a.	26 municipalities
Act 4082	1933-11-29	San Juan	renamed from Bolbok
RA 162	1947-06-20	City of Lipa	converted from municipality	1 city, 25 municipalities
EO 140 (1948)	1948-07-01	Pansipit	separated from Lemery Seat of govt: Bo. Guitna	1 city, 26 municipalities
EO 148 (1948)	1948-07-02		suspending EO 140 (1948)
EO 212 (1949)	1949-04-07	Agoncillo	• lifted suspension under EO 148 (1948) • renamed from Pansipit
EO 279 (1949)	1949-12-01	Padre Garcia	separated from Rosario Seat of govt: Bo. Lumang Bayan	1 city, 27 municipalities
RA 1229	1955-08-09	San Nicolas	separated from Taal Seat of govt: n.a.	1 city, 28 municipalities
RA 1344	1955-06-17	Tingloy	separated from Bauan Seat of govt: Bo. Tingloy	1 city, 29 municipalities
EO 454 (1961)	1961-12-28	Santa Teresita	separated from Taal, San Nicolas, San Luis Seat of govt: Bo. Sambat	1 city, 30 municipalities
RA 5495	1969-07-23	Batangas City	converted from municipality	2 cities, 29 municipalities
RA 5659	1969-06-21	Balete	separated from Lipa Seat of govt: Bo. Balete	2 cities, 30 municipalities
RA 5689		Laurel	separated from Talisay Seat of govt: Bo. Bayuyungan	2 cities, 31 municipalities
RA 6116	1969-08-04	San Pascual	separated from Bauan Seat of govt: Bo. San Pascual	2 cities, 32 municipalities
RA 9005	2001-03-10	City of Tanauan	converted from municipality	3 cities, 31 municipalities
RA 11086	2019-09-07	City of Sto. Tomas		4 cities, 30 municipalities
RA 11544	2022-09-03	City of Calaca		5 cities, 29 municipalities

Quezon (Tayabas)

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 103	1901-03-12		province of Tayabas organized under Act 183
Act 402	1902-05-17	Dolores, Tiaong, Candelaria, Sariaya	consolidated municipalities • Dolores merged into Tiaong • Candelaria merged into Sariaya
Act 417	1902-06-12	Baler, Casiguran	annexed District of Principe
		Binangonan de Lampon, Polillo	annexed District of Infanta
Act 499	1902-11-10	Boac, Gasan, Mogpog, Santa Cruz, Torrijos	annexed province of Marinduque
Act 558	1902-12-16	Infanta	renamed from Binangonan de Lampon
Act 956	1903-10-23	Mulanay, Bondoc, San Narciso, Pitogo, Macalelon, Unisan, Sampaloc, Mauban, Alabat, Atimonan, Baler, Boac, Calauag, Candelaria, Catanauan, Gasan, Guinayangan, Gumaca, Infanta, Casiguran, Lopez, Lucena, Lucban, Mogpog, Pagbilao, Polillo, Santa Cruz, Sariaya, Tayabas, Tiaong, Torrijos	reduced 31 municipalities to 27 • Bondoc, San Narciso merged into Mulanay • Macalelon, Unisan merged into Pitogo	27 municipalities
Act 1027	1903-12-18	Candelaria	amended Act 956	26 municipalities
Act 1209	1904-07-26	Mogpog	merged into Boac	25 municipalities
Act 1550	1906-10-25	Casiguran	merged into Baler	24 municipalities
Act 1649	1907-05-17		created, subprovince of Marinduque
Act 1721	1907-09-20	Candelaria	separated from Sariaya	26 municipalities
		Casiguran	separated from Baler
EO 85 (1908)	1909-01-01	Unisan	separated from Pitogo	27 municipalities
EO 129 (1909)	1910-01-01	Dolores	separated from Tiaong	29 municipalities
		Mogpog	separated from Boac
EO 84 (1911)	1912-01-01	Macalelon	separated from Pitogo	30 municipalities
EO 86 (1912)	1913-01-01	San Narciso	separated from Mulanay	31 municipalities
EO 101 (1913)	1914-01-01	Quezon	separated from Alabat	32 municipalities
EO 99 (1916)	1917-01-01	Laguimanoc	separted from Atimonan	33 municipalities
EO 40 (1918)	1919-01-01	Buenavista	separted from Gasan	34 municipalities
Act 2880	1920-01-21	Boac, Buenavista, Gasan, Mogpog, Santa Cruz, Torrijos	separated to form Marinduque	28 municipalities
Act 3389	1927-12-03	Padre Burgos	renamed from Laguimanoc
EO 207 (1929)	1929-11-01	General Luna	separated from Macalelon	29 municipalities
EO 208 (1929), EO 213 (1929)	1929-11-01	Perez	separated from Alabat	30 municipalities
EO 152 (1938)	1938-07-01	Bondo	separated from Mulanay	31 municipalities
EO 185 (1939)	1939-04-01	Agdangan	separated from Unisan	32 municipalities
CA 527	1940-04-11	Aurora	renamed from Bondo
EO 316 (1940)	1941-01-01	Tagkawayan	separated from Guinayangan	33 municipalities
RA 14	1946-09-07		province renamed from Tayabas to Quezon
EO 246 (1949)	1949-07-21	Maria Aurora	separated from Baler	35 municipalities
		General Nakar	separated from Infanta
RA 250	1948-06-12	Burdeos	separated from Polillo	36 municipalities
RA 495	1950-08-26	Buenavista	separated from Guinayangan	37 municipalities
EO 375 (1950)	1950-11-27	Dipaculao	separated from Baler	38 municipalities
RA 648	1951-06-14	Baler, Casiguran, Maria Aurora, Dipaculao	separated to form part of subprovince of Aurora	34 municipalities
EO 270 (1957)	1957-10-04	San Antonio	separated from Tiaong	35 municipalities
RA 2452	1959-06-21	Municipal district of Panukulan	separated from Polillo	35 municipalities 1 municipal district
EO 353 (1959)	1959-08-20	Municipal district of San Andres	separated from San Narciso	35 municipalities 2 municipal districts
EO 410 (1960)	1960-12-15	Municipal district of Real	separated from Infanta	35 municipalities 3 municipal districts
RA 3271	1961-06-17	City of Lucena	converted from municipality	1 city 34 municipalities 3 municipal districts
RA 3372	1961-06-18	Municipal district of Jomalig	separated from Polillo	1 city 34 municipalities 4 municipal districts
RA 3373	1961-06-18	Municipal district of Patnanungan	separated from Burdeos	1 city 34 municipalities 5 municipal districts
RA 3493	1962-06-16	Plaridel	separated from Atimonan Seat of govt: Bo. Siain	1 city 35 municipalities 5 municipal districts
RA 3754	1963-06-22	Real	converted from municipal district	1 city 36 municipalities 4 municipal districts
EO 174 (1965)	1963-07-01	San Andres		1 city 37 municipalities 3 municipal districts
RA 4977	1967-06-17	San Francisco	renamed from Aurora
EO 77 (1967)	1967-07-18	Panukulan	converted from municipal district	1 city 38 municipalities 2 municipal districts
EO 184 (1969)	1968-07-01	Jomalig		1 city 40 municipalities
		Patnanungan
RA 9398	2007-03-21	City of Tayabas	converted from municipality	2 cities 39 municipalities

Aurora

Legal Basis	Effective Date	Local government units	Actions	Statistics
RA 648	1951-06-14	Baler, Casiguran, Maria Aurora, Dipaculao	subprovince created from Tayabas	4 municipalities
RA 1536	1956-06-16	Municipal district of Dingalan	separated from Baler	4 municipalities 1 municipal district
RA 2452	1959-06-21	Municipal district of Dilasag	separated from Casiguran	4 municipalities 3 municipal districts
		Municipal district of San Luis	separated from Baler
RA 3487	1962-06-16	San Luis	converted from municipal district	5 municipalities 2 municipal districts
RA 3490	1962-06-16	Dingalan		6 municipalities 1 municipal district
RA 4757	1966-06-18	Municipal district of Dinalungan	separated from Casiguran	6 municipalities 2 municipal districts
RA 4785	1966-06-18	Dilasag	converted from municipal district	7 municipalities 1 municipal district
EO 184 (1969)	1969-06-23	Dinalungan		8 municipalities
BP 7	1979-05-20		Aurora converted to regular province

Marinduque

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 125	1901-05-01		Marinduque created under Act 83
Act 423	1902-06-23		annexed province of Mindoro
		Lubang, Looc	annexed from Cavite
Act 499	1902-11-10	Boac, Gasan, Mogpog, Santa Cruz, Torrijos	province abolished, annexed to Tayabas
Part of Tayabas (1902-1920)
Act 1649	1907-05-17		subprovince created from Tayabas
Act 2880, EO 12 (1920)	1920-02-22	Boac, Buenavista, Gasan, Mogpog, Santa Cruz, Torrijos	converted to regular province	6 municipalities

Mindoro

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 423	1902-06-23		annexed to province of Marinduque
Act 500	1902-11-10		Mindoro organized under Act 83, repealed Act 423
Act 1280	1905-01-04	Lubang, Looc, Mamburao, Paluan, Abra de Ylog, Calapan, Puerto Galera, Pinamalayan, Pola, Bulalacao, Mansalay, Mangarin, Naujan, Sablayan, Caluya	reduced 15 municipalities to 8 • Looc merged into Lubang • Paluan, Abra de Ylog merged into Mamburao • Puerto Galera merged into Calapan • Pola merged into Pinamalayan • Mansalay, Mangarin merged into Bulalacao	8 municipalities
Act 1665	1907-07-02	Concepcion	annexed from Romblon	9 municipalities
EO 83 (1909)	1909-09-15	Townships of Bulalacao, Calapan, Caluya, Lubang, Mamburao, Naujan, Pinamalayan, Sablayan	converted municipalities to townships	1 municipality, 8 townships
EO 88 (1909)		Townships of Bulalacao, Calapan, Caluya, Concepcion, Lubang, Mamburao, Naujan, Pinamalayan, Sablayan	amended EO 83 (1909)	9 townships
EO 31 (1910)	1910-05-01	Township of Paluan	separated from Township of Mamburao	12 townships
		Township of Abra de Ilog
		Township of San Jose	separated from Township of Sablayan, Bulalacao
EO 51 (1911)	1912-01-01	Township of Pola	separated from Township of Pinamalayan	13 townships
EO 85 (1916)	1917-01-01	Township of Looc	separated from Township of Lubang	14 townships
(Act 2711)	1917-10-01	(Caluya)	(Administrative Code of 1917: annexed to Antique)	13 townships
Act 2724, EO 5 (1918)	1918-02-22	Township of Concepcion	annexed to Capiz	12 townships
Act 2824	1919-03-05		abolishing townships	12 municipalities
EO 4 (1921)	1921-02-05	Municipal district of Baco	separated from Calapan	12 municipalities, 1 municipal district
Act 2964	1921-02-20		province of Mindoro organized as a regular province
Act 3415	1927-12-07	Puerto Galera	separated from Calapan	14 municipalities, 1 municipal district
		Bongabong	separated from Pinamalayan
Act 3498	1928-12-08	Mansalay	separated from Bulalacao	17 municipalities
		Baco	converted from municipal district
		San Teodoro	separated from municipal district of Baco
EO 181 (1948)	1948-11-15	Roxas	separated from Mansalay	18 municipalities
EO 210 (1949)	1949-04-01	Santa Cruz	separated from Mamburao	19 municipalities
RA 505	1950-11-15	Baco, Bongabong, Bulalacao, Calapan, Mansalay, Naujan, Pinamalayan, Pola, Puerto Galera, Roxas, San Teodoro	divided into Oriental Mindoro
		Abra de Ilog, Looc, Lubang, Mamburao, Paluan, Sablayan, San Jose, Santa Cruz	divided into Occidental Mindoro

Oriental Mindoro

Legal Basis	Effective Date	Local government units	Actions	Statistics
RA 505	1950-11-15	Baco, Bongabong, Bulalacao, Calapan, Mansalay, Naujan, Pinamalayan, Pola, Puerto Galera, Roxas, San Teodoro	province separated from Mindoro	11 municipalities
EO 620 (1953)	1953-09-18	Victoria	separated from Naujan	12 municipalities
RA 2514	1959-06-21	Bansud	separated from Bongabong	13 municipalities
RA 3609	1963-06-22	Socorro	separated from Pola	14 municipalities
EO 117 (1964)	1964-10-01	Gloria	separated from Pinamalayan	15 municipalities
GR L-23825	1965-12-24	Gloria	creation voided, reverted to Pinamalayan	14 municipalities
RA 4651	1966-06-09	Gloria	separated from Pinamalayan	15 municipalities
RA 8475	1998-03-20	City of Calapan	converted from Mun of Calapan	1 city 14 municipalities

Occidental Mindoro

Legal Basis	Effective Date	Local government units	Actions	Statistics
RA 505	1950-11-15	Abra de Ilog, Looc, Lubang, Mamburao, Paluan, Sablayan, San Jose, Santa Cruz	province separated from Mindoro	8 municipalities
RA 4732	1966-06-18	Calintaan	separated from Sablayan	9 municipalities
RA 5459	1969-04-03	Magsaysay	separated from San Jose	10 municipalities
RA 5460	1969-04-03	Rizal	separated from San Jose	11 municipalities

Ambos Camarines

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 123	1901-04-27		Ambos Camarines organized under Act 83 Capital: Nueva Caceres
Act 544	1902-12-03	Calasgasan	merged into Daet
Act 959	1903-10-23	Basud, Daet, Talisay, Indan, Bombon, Quipayo, Manguiring, Calabanga, Camaligan, Canaman, Nueva Caceres, Mabatobato, Pili, Magarao, Tinambac, Pasacao, Baao, Bato, Buhi, Bula, Capalonga, Caramoan, Gainza, Goa, Iriga, Labo, Lagonoy, Libmanan, Lupi, Mambulao, Milaor, Minalabac, Nabua, Pamplona, Paracale, Ragay, Sagnay, San Fernando, San Jose, San Vicente, Sipocot, Siruma, Tigaon	reduced 43 municipalities to 35: • Basud merged into Daet • Talisay merged into Indan • Bombon, Quipayo, Manguiring (1/2 part) merged into Calabanga • Camaligan, Canaman (1/2 part) merged into Nueva Caceres • Mabato-bato merged into Pili • Canaman (2/2 part) merged into Magarao • Manguiring (2/2 part) merged into Tinambac • San Fernando (part) merged into Pasacao	35 municipalities
EO 109 (1908)	1909-01-01	Canaman	separated from Nueva Caceres, Magarao	37 municipalities
		Camaligan	separated from Nueva Caceres
EO 114 (1908)		Basud	separated from Daet	39 municipalities
		Talisay	separated from Indan
EO 82 (1910)	1911-01-01	Cabusao	separated from Libmanan Seat of govt: Bo. Bacsalan	40 municipalities
EO 36 (1912)	1913-01-01		fmr municipality of Bombon transferred from Calabanga to Magarao
Act 2390	1914-02-28	Naga	renamed from Nueva Caceres
Act 2809, EO 22 (1920)	1920-04-15	Daet, Indan, Capalonga, Labo, Mambulao, Paracale, San Vicente, Basud, Talisay	separated Camarines Norte
		Cabusao, Canaman, Calabanga, Camaligan, Gainza, Libmanan, Lupi, Magarao, Milaor, Minalabac, Naga, Pamplona, Pasacao, Ragay, San Fernando, Sipocot, Baao, Buhi, Bula, Bato, Caramoan, Goa, Iriga, Lagonoy, Nabua, Pili, Sagnay, San Jose, Siruma, Tigaon, Tinambac	renamed to Camarines Sur

Camarines Norte

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 2809, EO 22 (1920)	1920-04-15	Daet, Indan, Capalonga, Labo, Mambulao, Paracale, San Vicente, Basud, Talisay	• separated Camarines Norte	9 municipalities
CA 690	1945-10-15	Vinzons	renamed from Indan
RA 341	1948-07-26	Mercedes	separated from Daet Seat of govt: Bo. Mercedes	10 municipalities
RA 5480	1969-06-21	Santa Elena	separated from Capalonga Seat of govt: Bo. Santa Elena	11 municipalities
RA 6144	1970-11-09	Imelda	separated from Daet, Basud Seat of govt: Bo. Matacong	12 municipalities
RA 6708	1989-02-10	San Lorenzo Ruiz	renamed from Imelda

Camarines Sur

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 2809, EO 22 (1920)	1920-04-15	Cabusao, Canaman, Calabanga, Camaligan, Gainza, Libmanan, Lupi, Magarao, Milaor, Minalabac, Naga, Pamplona, Pasacao, Ragay, San Fernando, Sipocot, Baao, Buhi, Bula, Bato, Caramoan, Goa, Iriga, Lagonoy, Nabua, Pili, Sagnay, San Jose, Siruma, Tigaon, Tinambac	Camarines Sur	31 municipalities
EO 56 (1936)	1937-01-01	(Del Gallego)	separated from Ragay Seat of govt: Bo. Danawin	32 municipalities
RA 305	1948-06-18	City of Naga	converted from municipality	1 city, 31 municipalities
EO 205 (1949)	1949-03-04	Anderson	separated from Carmoan Seat of govt: Bo. San Miguel	1 city, 32 municipalities
EO 218 (1949)	1949-05-28	Garchitorena	renamed from Anderson
EO 243 (1949)	1949-07-15	Ocampo	separated from Pili Seat of govt: Bo. Mabatobato	1 city, 33 municipalities
EO 251 (1949)	1949-07-27	Bombon	separated from Magarao	1 city, 34 municipalities
EO 485 (1951)	1951-12-03	Balatan	separated from Nabua Seat of govt: Bo. Siramag	1 city, 35 municipalities
RA 1336	1955-06-16		Capital transferred to Pili
RA 3421	1963-11-12	Parubcan	separated from Lagonoy, (San Jose) Seat of govt: Bo. Parubcan	1 city, 36 municipalities
RA 5261	1968-06-15	City of Iriga	converted from municipality	2 cities, 35 municipalities
RA 5742	1969-06-21	Presentacion	amended RA 3421 • renamed from Parubcan • barrios returned to Lagonoy, San Jose

Albay

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 122	1901-04-26		Albay organized under Act 83 Capital: Albay
Act 169	1901-07-16		annexed island of Catanduanes
Act 1557	1906-10-31	Bato, Baras, Virac, Viga, Payo, Bagamanoc, Pandan, Caramoran, (Calolbon)	reducing 27 municipalities to 23, by consolidating municipalities on Catanduanes: • Baras merged into Bato • Bato (part), merged into Virac • Payo, Bagamanoc merged into Viga • Caramoran merged into Pandan	23 municipalities
Act 1582	1907-01-09		municipalities as of Election Law (1907): • 1st: Bacacay, Libog, Malilipot, Malinao, Tabaco, Tiwi • 2nd: Albay, Daraga, Bato*, Calolbon*, Legazpi, Manito, Pandan*, Rapu-Rapu, Viga*, Virac* • 3rd: Camalig, Guinobatan, Jovellar, Libon, Ligao, Oas, Polangui	23 municipalities
Act 1731	1907-10-01	Albay, Daraga, Legazpi	Daraga, Legazpi merged into Albay	21 municipalities
EO 69 (1911)	1912-01-01	Baras	separated from Bato	22 municipalities
EO 51 (1920)	1921-01-01	Daraga	separated from Legazpi	23 municipalities
EO 55 (1920)		Panganiban	• fmr municipalities of Payo, Bagamanoc separated from Viga Seat of govt: Bo. Payo	24 municipalities
Act 3253	1925-12-03	Legazpi	renamed from Albay
CA 687	1945-10-26	Baras, Bato, Calolbon, Pandan, Panganiban, Viga, Virac	Sub-province of Catanduanes separated as Province of Catanduanes	17 municipalities
RA 306	1948-12-15	Daraga, City of Legazpi	• Daraga merged into Legazpi • converted from municipality	1 city, 15 municipalities
RA 993	1954-06-08	City of Legazpi, Legazpi, Daraga	repealed RA 306	17 municipalities
RA 2234	1959-06-12	City of Legazpi	converted from municipality	1 city, 16 municipalities
RA 2505	1959-06-21	Locsin	renamed from Daraga
RA 2520		Santo Domingo	renamed from Libog
RA 3817	1963-11-12	Pio Duran	separated from Ligao, Guinobatan, Jovellar Seat of govt: Bo. Malacbalac	1 city, 17 municipalities
RA 4994	1967-06-17	Daraga	renamed from Locsin
(PD 125)	(1973-02-05)		(Daraga merged into City of Legazpi)
RA 9008	2001-03-24	City of Ligao	converted from municipality	2 cities, 16 municipalities
RA 9020		City of Tabaco		3 cities, 15 municipalities

Catanduanes

Legal Basis	Effective Date	Local government units	Actions	Statistics
CA 687	1945-10-26	Baras, Bato, Calolbon, Pandan, Panganiban, Viga, Virac	province of Catanduanes created from Albay	7 municipalities
RA 159, EO 159 (1948)	1948-09-01	Caramoran	separated from Pandan Seat of govt: Bo. Caramoran	8 municipalities
RA 491	1950-06-12	Bagamanoc	separated from Panganiban Seat of govt: Bo. Bagamanoc	9 municipalities
RA 614	1951-05-15	Gigmoto	separated from Viga, Baras	10 municipalities
EO 503 (1952)	1952-05-27	San Miguel	separated from Bato	11 municipalities
Act 3948	1964-06-18	San Andres	renamed from Calolbon

Sorsogon

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 124	1901-04-30		Sorsogon organized under Act 83
Act 940	1903-10-12	Prieto Diaz	separated from Bacon, Gubat	16 municipalities
Act 1413	1905-11-23	Masbate, Milagros, Aroroy, San Pascual, Dimasalang, Mobo, Uson, Cataingan, Placer, Pulanduta, Mandaon, San Jacinto, San Fernando	annexed province of Masbate as subprovince	29 municipalities
EO 81 (1910)	1911-01-01	Mandaon, Pulanduta, Placer, Uson, Mobo	reduced 29 municipalities to 24: • Mandaon, Pulanduta merged into Milagros • Placer merged into Cataingan • Uson merged into Dimasalang • Mobo merged into Masbate	24 municipalities
Act 2934, EO 3 (1921)	1921-01-25	Masbate, Milagros, Aroroy, San Pascual, Dimasalang, Cataingan, San Jacinto, San Fernando	separated to create Masbate	16 municipalities
RA 8806	2000-12-16	Bacon, City of Sorsogon	• Bacon merged into Sorsogon • converted from municipality	1 city, 15 municipalities

Masbate

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 105	1901-03-18		District of Masbate organized as province under Act 83
Act 993	1903-11-17	Masbate, Magdalena, Milagros, Malbug, Aroroy/San Agustin, Baleno, San Pascual, Claveria, Dimas-Alang/Palanas, Mobo, Uson, Cataingan, Placer, Pulanduta, Mandaon, San Jacinto, San Fernando	reduced 17 municipalities to 13: • Magdalena merged into Masbate • Malbug merged into Milagros • San Agustin, Baleno merged to form Aroroy • Claveria merged into San Pascual • Palanas renamed to Dimasalang	13 municipalities
Act 1413	1905-11-23		Masbate annexed to Sorsogon as subprovince
Subprovince of Masbate (1905-1921) under the province of Sorsogon
Act 2934, EO 3 (1921)	1921-01-25	Masbate, Milagros, Aroroy, San Pascual, Dimasalang, Cataingan, San Jacinto, San Fernando	Masbate separated from Sorsogon	8 municipalities
EO 244 (1949)	1949-07-18	Uson	separated from Dimasalang, Masbate	14 municipalities
		Mobo	separated from Masbate
		Balud	separated from Aroroy, Masbate (Bo. Magdalena)
		Baleno	separated from Milagros
		Cawayan
		Mandaon
RA 292	1948-06-16	Placer	separated from Cataingan	15 municipalities
RA 641	1951-06-11	Limbuhan	separated from Cataingan	16 municipalities
RA 642		Batuan	separated from San Fernando	17 municipalities
RA 639		Palanas	separated from Dimasalang	18 municipalities
RA 1116	1954-06-15	Pio V. Corpuz	renamed from Limbuhan
EO 238 (1957)	1957-02-13	Monreal	separated from San Jacinto Seat of govt: Bo. Ago	19 municipalities
RA 2187	1959-05-07	Claveria	renamed from San Pascual	20 municipalities
EO 337 (1959)	1959-05-07	Esperanza	separated from Placer Seat of govt: n.a.	21 municipalities
RA 8807	2000-09-30	City of Masbate	converted from municipality of Masbate	1 city, 20 municipalities

Visayas

Antique

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 114	1901-04-13		Antique organized under Act 83
Act 961	1903-10-23	Pandan, Sebaste, Culasi, Tibiao, Laua-an, Barbaza, Guijisan, Bugasong, Valderrama, Patnongon, Carit-an, San Pedro, San Jose de Buenavista, Antique, Sibalom, Egaña, Dao, Anini-y, San Remigio	reducing 20 21 municipalities to 11: • Sebaste (part) merged into Pandan • Sebaste (part) merged into Culasi • Barbaza, Guijisan merged into Laua-an • Carit-an, San Pedro (part) merged into Patnongon • Antique, San Pedro (part) merged into San Jose de Buenavista • Egaña merged into Sibalom • Anini-y merged into Dao	11 municipalities
Act 987	1903-11-07	Guintas	amended Act 961: • Guintas merged into San Jose de Buenavista
EO 129 (1914)	1915-01-01	Barbaza	separated from Laua-an	12 municipalities
(Act 2711)	1917-10-01	(Caluya)	(Administrative Code of 1917: annexed to Antique)	13 municipalities
EO 253 (1949)	1949-08-05	Anini-y	separated from Dao Seat of govt: Bo. Anini-y	15 municipalities
		Libertad	separated from Pandan Seat of govt: Bo. Libertad
EO 3 (1954)	1954-01-05	Hamtic	separated from San Jose Seat of govt: Bo. Hamtic	16 municipalities
EO 421 (1961)	1961-03-10	Belison	separated from Patnongon Seat of govt: Bo. Belison	17 municipalities
EO 99 (1964)	1964-09-26	Sebaste	separated from Culasi, Pandan Seat of govt: Bo. Sebaste	18 municipalities
GR L-23825	1965-12-24	Sebaste	creation voided, reverted to Culasi, Pandan	17 municipalities
RA 4870	1967-05-08	Sebaste	separated from Culasi, Pandan Seat of govt: Bo. Sebaste	18 municipalities
BP 10	1978-12-06	Tobias Fornier	renamed from Dao

Capiz

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 720	1903-04-03	Capiz, Loctugan, Ivisan, Panitan, Dao, Cuartero, Dumarao, Dumalag, Tapas, Sigma, Mambusao, Jamindan, Jagnaya, Panay, Pontevedra, Maayon, Pilar, Casanayan, Sapian, Calibo, Banga, Lezo, Numancia, Malinao, Ibajay, Nabas, Buruanga, Libacao, Madalag	reducing the 34 municipalities to 22: • Loctugan merged into Capiz • Cuartero merged into Dao • Jagnaya merged into Jamindan • Maayon merged with Pontevedra • Casanayan merged with Pilar • Banga, Lezo, Numancia merged into Calibo • Madalag merged into Libacao	20 municipalities
		Batan, Jimeno, Balete, New Washington	• Batan, Jimeno, Balete, Calibo (part) merged to form New Washington	22 municipalities
		Macato, Tangalan, Taft	• Macato, Tangalan merged to form Taft
Act 1665	1907-07-02	Romblon, Cajidiocan, Badajoz, Odiongan, Looc, San Fernando	annexed Romblon as subprovince	28 municipalities
EO 58 (1909)	1910-01-01	Lezo	fmr municipalities of Lezo, Numancia separated from Calibo	29 municipalities
EO 81 (1911)	1912-01-01	Banga	separated from Calivo	30 municipalities
Act 2684	1917-03-09	Makato	renamed from Taft
EO 79 (1917)	1918-01-01	Jones	fmr municipalities of Banton, Corcuera separated from Romblon to form Jones	31 municipalities
EO 86 (1917)	1918-01-01	Altavas	• separated from New Washington • renamed from Jimeno	32 municipalities
Act 2724, EO 5 (1918)	1918-02-22	Romblon, Cajidiocan, Badajoz, Odiongan, Looc, San Fernando, Jones	separated from Capiz to reestablish Romblon	25 municipalities
EO 87 (1919)	1920-01-01	Balete	separated from New Washington	33 (26) municipalities
Act 3086	1923-03-16	Numancia	renamed from Lezo
EO 288 (1930)	1931-01-01	Batan	separated from New Washington	27 municipalities
EO 159 (1938)	1939-01-01	Cuartero	separated from Dao	28 municipalities
EO 364 (1941)	1942-01-01	Lezo	separated from Numancia	29 municipalities
RA 285	1948-06-16	Tangalan	separated from Makato	30 municipalities
RA 291	1948-06-17	Madalag	separated from Libacao	31 municipalities
RA 374	1949-06-14	President Roxas	separated from Pontevedra	32 municipalities
RA 381	1949-06-15	Malay	separated from Buruanga	33 municipalities
RA 603	1951-04-11	City of Roxas	• converted and renamed from municipality of Capiz	1 city 32 municipalities
RA 1203	1955-03-30	Ma-ayon	separated from Pontevedra	1 city 33 municipalities
RA 1414	1956-04-25	Altavas, Balete, Batan, Banga, Buruanga, Ibajay, Kalibo, Lezo, Libacao, Madalag, Malay, Makato, Malinao, Nabas, New Washington, Numancia, Tangalan	separated to form Aklan	1 city 16 municipalities

Aklan

Legal Basis	Effective Date	Local government units	Actions	Statistics
RA 1414	1956-04-25	Altavas, Balete, Batan, Banga, Buruanga, Ibajay, Kalibo, Lezo, Libacao, Madalag, Malay, Makato, Malinao, Nabas, New Washington, Numancia, Tangalan	Aklan created from Capiz	17 municipalities

Iloilo

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 113	1901-04-11		• Iloilo organized under Act 83 • Commandancia of Concepcion merged into Iloilo
Act 433	1902-07-22	Jordan	renamed from Nagaba
Act 719	1903-04-04	Iloilo, La Paz, Mandurriao, Molo, Jaro, Santa Barbara, Pavia, Leganes, Zarraga, Lucena, Pototan, Mina, Dingle, Cabatuan, Maasin, Miagao, San Joaquin, Janiuay, Lambunao, Passi, Dueñas, San Enrique, Calinog, Sara, Ajuy, Lemery, Concepcion, San Dionisio, Leon, San Miguel, Alimodian, Tigbauan, Cordoba, Guimbal, Igbaras, Tubungan, Arevalo, Oton, Banate, Barotac Viejo, Anilao, Dumangas, Barotac Nuevo, Buenavista, Nabalas, Nagaba, Nueva Valencia, Balasan, Batad, Estancia, Carles	reduced 51 municipalities to 17: • La Paz, Mandurriao, Molo, Jaro merged into Iloilo • Pavia, Leganes, Zarraga, Lucena merged into Santa Barbara • Mina, Dingle merged into Pototan • Maasin merged into Cabatuan • San Joaquin merged into Miagao • Lambunao merged into Janiuay • Dueñas, San Enrique, Calinog merged into Passi • Ajuy, Lemery, Concepcion, San Dionisio merged into Sara • San Miguel, Alimodian merged into Leon • Cordoba merged into Tigbauan • Igbaras, Tubungan merged into Guimbal • Barotac Viejo, Anilao merged into Banate • Barotac Nuevo merged into Dumangas • Nabalas, Nagaba, Nueva Valencia merged into Buenavista • Batad, Estancia, Carles merged into Balasan	17 municipalities
Act 1005	1903-11-21	Dumangas, Barotac Nuevo	amended Act 719 • restored Barotac Nuevo • Dumangas merged into Barotac Nuevo
Act 1333	1905-05-19		amended Act 719 • fmr mun of Pavia merged into Iloilo
EO 64 (1907)	1908-02-15	Jaro	separated from Iloilo • fmr mun of Pavia merged into Jaro	18 municipalities
EO 108 (1908)	1909-01-01	Dingle	separated from Pototan	19 municipalities
EO 73 (1910)	1911-01-01	San Joaquin	separated from Miagao	21 municipalities
		Dumangas	separated from Barotac Nuevo
EO 76 (1911)	1912-01-01	Lambunao	separated from Janiuay	22 municipalities
EO 53 (1915)	1916-01-01	Dueñas	separated from Passi	23 municipalities
EO 55 (1915)		San Miguel	separated from Leon	24 municipalities
EO 86 (1916)	1917-01-01	Ajuy	separated from Sara	25 municipalities
EO 40 (1917)	1918-01-01	Maasin	separated from Cabatuan	26 municipalities
EO 84 (1917)		Barotac Viejo	separated from Banate	27 municipalities
EO 91 (1917)		Jordan	• separated from Buenavista • fmr mun of Nueva Valencia merged into Jordan	28 municipalities
EO 44 (1918)	1919-01-01	Estancia	separated from Balasan	29 municipalities
EO 45 (1918)		Alimodian	separated from Leon	30 municipalities
EO 64 (1918)		Igbaras	separated from Guimbal	31 municipalities
EO 70 (1919)	1920-01-01	La Paz	separated from	32 municipalities
EO 80 (1919)		Carles	separated from Balasan	33 municipalities
EO 52 (1920)	1921-01-01	San Dionisio	separated from Sara	34 municipalities
EO 53 (1920)		Calinog	separated from Passi	35 municipalities
EO 54 (1920)		Concepcion	separated from Sara	36 municipalities
EO 1 (1921)		Pavia	separated from Jaro	37 municipalities
CA 158	1936-11-09	City of Iloilo	converted from municipality	1 city, 34 municipalities
		La Paz, Arevalo	La Paz, Arevalo merged to form City of Iloilo
EO 143 (1938)	1938-05-01	Tubungan	separated from Guimbal	1 city, 35 municipalities
EO 220 (1939)	1939-10-01	Anilao	separated from Banate	1 city, 36 municipalities
EO 241 (1939)	1940-01-01	Leganes	separated from Jaro	1 city, 37 municipalities
EO 295 (1940)	1941-01-01	Zarraga	separated from Santa Barbara	1 city, 38 municipalities
EO 296 (1940)		Nueva Valencia	separated from Jordan Seat of govt: Bo. Santa Ana	1 city, 39 municipalities
CA 604	1941-01-16	Jaro	merged into City of Iloilo	1 city, 38 municipalities
RA 50	1946-10-04	Lucena	separated from Santa Barbara	1 city, 39 municipalities
RA 197	1948-01-01	Lemery	separated from Sara	1 city, 40 municipalities
EO 254 (1949)	1949-08-05	Batad	separated from Balasan	1 city, 41 municipalities
RA 1255	1955-06-10	New Lucena	renamed from Lucena
EO 259 (1957)	1957-07-12	San Enrique	separated from Passi	1 city, 42 municipalities
EO 105 (1964)	1964-09-28	Badiangan	separated from Janiuay Seat of govt: Bo. Badiangan	1 city, 43 municipalities
EO 106 (1964)	1964-10-01	Mina	separated from Pototan	1 city, 44 municipalities
GR L-23825	1965-12-24	Badiangan, Mina	creation declared null and void	1 city, 42 municipalities
RA 4667	1966-06-18	(Buenavista, Jordan, Nueva Valencia)	Subprovince of Guimaras created Seat of govt: Jordan	(3 municipalities)
RA 5006	1967-06-17	Badiangan	separated from Janiuay Seat of govt: Bo. Badiangan	1 city, 43 municipalities
RA 5442	1968-09-09	Mina	separated from Pototan	1 city, 44 municipalities
RA 5471	1969-06-21	San Rafael	separated from Barotac Viejo Seat of govt: Bo. San Rafael	1 city, 45 municipalities
RA 5511		Bingawan	separated from Calinog	1 city, 46 municipalities
RA 7160 §462	1992-05-11	Buenavista, Jordan, Nueva Valencia	subprovince Guimaras separated as province	1 city, 43 municipalities
RA 8469	1998-03-14	City of Passi	converted from municipality	2 cities, 42 municipalities

Guimaras

Legal Basis	Effective Date	Local government units	Actions	Statistics
RA 7160 §462	1992-05-11	Buenavista, Jordan, Nueva Valencia	• Guimaras converted from subprovince • separated from Iloilo	3 municipalities
RA 7896	1995-05-08	Sibunag	separated from Jordan, Nueva Valencia	5 municipalities
RA 7897		San Lorenzo	separated from Buenavista, Jordan

Negros Occidental

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 119	1901-04-20		Occidental Negros organized under Act 83
Act 716	1903-04-02	Isiu/ Cauayan, Ilog, Guijulngan, Cavancalan, Jimamailan, Suay, Isabela, Binalbagan Soledad, Jinigaran, Pontevedra, La Castellana, La Carlota, San Enrique, Valladolid, Bago, Maao, Pulupandan, Murcia Sumag, Granada, Bacolod, Talisay, Guimbaloan, Silay, Eustaquio Lopez, Saravia, Victorias, Manapla, Cadiz, Sagay, Escalante, Calatrava, San Carlos	reduced 34 municipalities to 21: • Guijulngan (1/2 part), Isiu merged into Cauayan • Guijulngan (2/2 part), Cavancalan merged into Ilog • Suay merged into Jimamailan • Soledad merged into Binalbagan • La Castellana merged into Pontevedra • San Enrique merged into La Carlota • Pulupandan (1/2 part) merged into Valladolid • Maao, Sumag (1/3 part), Pulupandan (2/2 part) merged into Bago • Sumag (2/3 part) merged into Murcia • Sumag (3/3 part), Granada merged into Bacolod • Guimbaloan, Eustaquio Lopez (1/2 part) merged into Silay • Eustaquio Lopez (2/2 part) merged into Saravia • Calatrava merged into San Carlos	21 municipalities
Act 1612	1907-08-10	Kabankalan	• separated from Ilog • renamed from Cavancalan	22 municipalities
EO 95 (1916)	1917-01-01	Pulupandan	separated from Valladolid, Bago	23 municipalities
EO 101 (1917)	1918-01-01	La Castellana	separated from Pontevedra	24 municipalities
EO 49 (1918)	1919-01-01	San Enrique	separated from La Carlota	25 municipalities
EO 28 (1923)	1924-01-01	Calatrava	separated from San Carlos	26 municipalities
CA 326	1938-06-18	City of Bacolod	converted from municipality	1 city, 25 municipalities
EO 141 (1948)	1948-07-01	Toboso	separated from Escalante Seat of govt: Bo. Toboso	1 city, 26 municipalities
EO 185 (1948)	1948-11-20	Sipalay	separated from Cauayan Seat of govt: Bo. Sipalay	1 city, 27 municipalities
EO 186 (1948)		Asia	separated from Cauayan Seat of govt: Bo. Asia	1 city, 28 municipalities
RA 631	1951-06-06	Magallon	separated from Isabela Seat of govt: Bo. Magallon	1 city, 29 municipalities
RA 1621	1957-06-12	City of Silay	converted from municipality	2 cities, 28 municipalities
RA 1630	1957-06-20	Moises Padilla	renamed from Magallon
EO 314 (1958)	1958-08-22	Candoni	separated from Cauayan Seat of govt: (Bo. Candoni)	2 cities, 29 municipalities
RA 2154	1959-04-26	Hinoba-an	renamed from Asia
RA 2643	1960-06-18	City of San Carlos	converted from municipality	3 cities, 28 municipalities
RA 4382	1965-06-19	City of Bago		4 cities, 27 municipalities
RA 4585		City of La Carlota		5 cities, 26 municipalities
RA 4984	1967-06-17	City of Cadiz		6 cities, 25 municipalities
RA 4896		Enrique B. Magalona	renamed from Saravia
BP 336	1983-02-09	Salvador Benedicto	separated from Murcia, Calatrava, City of San Carlos Seat of govt: Brgy. Igmaya-an	6 cities, 26 municipalities
RA 8192	1996-06-11	City of Sagay	converted from municipality	7 cities, 25 municipalities
RA 8297	1997-06-06	City of Kabankalan		8 cities, 24 municipalities
RA 8488	1998-02-11	City of Victorias		9 cities, 23 municipalities
RA 8489		City of Talisay		10 cities, 22 municipalities
RA 9014	2001-02-28	City of Escalante		11 cities, 21 municipalities
RA 9027	2001-03-05	City of Sipalay		12 cities, 20 municipalities
RA 9028		City of Himamaylan		13 cities, 19 municipalities

Negros Oriental

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 120	1901-04-20		Oriental Negros organized under Act 83
Act 715	1903-04-02	Dumaguete, Sibulan, Nueva Valencia, Bacong, Dauin, Zamboanguita, Siaton, Tolong, Bayawan, Ayuquitan, Amlan, Tanjay, Bais, Manjuyod, Tayasan, Jimalalud, Libertad, Guihulngan, Larena, Canoan, Lazi, Maria, Siquijor, San Juan	reduced 24 municipalities to 14: • Sibulan merged into Dumaguete • Zamboanguita merged into Dauin • Bayawan merged into Tolong • Amlan merged into Ayuquitan • Manjuyod merged into Bais • Jimalalud, Libertad merged into Tayasan • Canoan merged into Larena • Maria merged into Lazi • San Juan merged into Siquijor	14 municipalities
Act 1330	1905-04-18	Luzurriaga	renamed from Nueva Valencia
Act 1753	1907-10-08	(Larena, Lazi, Siquijor)	Subprovince of Siquijor created as subprovince of Oriental Negros
EO 37 (1908)	1909-01-01	Manjuyod	separated from Bais	16 municipalities
		Zamboanguita	separated form Dauin
EO 123 (1909)	1910-01-01	Maria	separated from Lazi	18 municipalities
		San Juan	separated from Siquijor
EO 75 (1910)	1911-01-01	Sibulan	separated from Dumaguete	19 municipalities
EO 84 (1912)	1913-01-01	Vallehermoso	separated from Guihulngan	20 municipalities
EO 93 (1912)		Jimalalud	fmr municipalities of Jimalalud, Libertad from separated from Tayasan	21 municipalities
EO 42 (1918)	1919-01-01	La Libertad	separated from Jimalalud	22 municipalities
EO 66 (1919)	1919-03-05	Municipal district of Tambo	separated from Tayasan	22 municipalities, 1 municipal district
EO 32 (1924)		Ayungon	separated from Tayasan	23 municipalities, 1 municipal district
EO 53 (1924)	1925-01-01	Talingting	separated from Larena	24 municipalities, 1 municipal district
Act 3863	1931-11-13	Enrique Villanueva	renamed from Talingting
EO 19 (1946)	1946-12-18	Canlaon	separated from Vallehermoso	25 municipalities, 1 municipal district
EO 111 (1947)	1948-01-01	Santa Catalina	separated from Tolong Seat of govt: Bo. Tolong Viejo	26 municipalities, 1 municipal district
RA 252	1948-06-14	Valencia	renamed from Luzurriaga
RA 327	1948-11-24	City of Dumaguete	converted from municipality	1 city, 25 municipalities, 1 municipal district
EO 228 (1949)	1949-06-17	Payabon	separated from Manjuyod	1 city, 26 municipalities, 1 municipal district
RA 435	1950-06-07	Amlan	renamed from New Ayuquitan
RA 535	1950-06-16	Pamplona	separated from Tanjay	1 city, 27 municipalities, 1 municipal district
RA 694	1952-05-09	Bayawan	renamed from New Tolong
RA 1212	1955-05-09	San Jose	separated from Amlan	1 city, 28 municipalities, 1 municipal district
EO 190 (1956)	1956-06-18	Municipal district of Tambo	merged into Ayungon	1 city, 28 municipalities
RA 2496	1959-06-21	Mabinay	separated from Bais	1 city, 29 municipalities
RA 2526		Bindoy	renamed from Payabon
RA 3445	1961-06-18	City of Canlaon	converted from municipality	2 cities, 28 municipalities
RA 5421	1968-06-15	Basay	separated from Bayawan	2 cities, 29 municipalities
RA 5444	1968-09-01	City of Bais	converted from municipality	3 cities, 28 municipalities
RA 6398	1971-11-08	Larena, Lazi, Maria, Siquijor, San Juan, Enrique Villanueva	separated from Negros Oriental	3 cities, 22 municipalities
RA 8983	2000-12-23	City of Bayawan	converted from municipality	4 cities, 21 municipalities
RA 9026	2001-03-31	City of Tanjay		5 cities, 20 municipalities
RA 9409	2007-07-14	City of Guihulngan		6 cities, 19 municipalities

Siquijor

Legal Basis	Effective Date	Local government units	Actions	Statistics
RA 6398	1971-11-08	Larena, Lazi, Maria, Siquijor, San Juan, Enrique Villanueva	• Subprovince of Siquijor converted into province • separated from Negros Oriental	6 municipalities

Cebu

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 116	1901-04-18		Cebu organized under Act 83
		San Nicolas	San Nicolas merged into Cebu
Act 952	1903-10-22	Cebu, Talamban, El Pardo, Mandaue, Consolacion, Liloan, Compostela, Catmon, Sogod, Dalaguete, Alcoy, Oslob, Nueva Caceres, Santander, Samboan, San Sebastian, Moalboal, Alcantara, Dumanjug, Ronda, Bantayan, Santa Fe, Madridejos, Opon, Santa Rosa, Cordova, Tudela, Poro, Alegria, Aloguinsan, Argao, Asturias, Badian, Balamban, Barili, Boljoon, Borbon, Bogo, Carcar, Carmen, Daanbantayan, Danao, Ginatilan, Malabuyoc, Medellin, Minglanilla, Naga, Pilar, Pinamungajan, San Fernando, San Francisco, San Remigio, Sibonga, Tabogon, Talisay, Tuburan, Toledo	reducing 57 municipalities to 41: • Talamban, El Pardo merged into Cebu • Consolacion merged into Mandaue • Compostela merged into Liloan • Sogod merged into Catmon • Alcoy merged into Dalaguete • Nueva Caceres, Santander merged into Oslob • San Sebastian merged into Samboan • Alcantara merged into Moalboal • Ronda merged into Dumanjug • Santa Fe, Madridejos merged into Bantayan • Santa Rosa, Cordova merged into Opon • Poro merged into Tudela	41 municipalities
EO 74 (1909)	1910-01-01	Santa Fe	separated from Bantayan	42 municipalities
EO 9 (1912)	1913-01-01	Ronda	separated from Dumanjug	43 municipalities
EO 73 (1912)		Poro	separated from Tudela	44 municipalities
EO 96 (1912)		Cordova	separated form Opon	45 municipalities
EO 111 (1913)	1914-01-01	Alcantara	separated from Moalboal	46 municipalities
EO 91 (1916)	1917-01-01	Alcoy	separated from Dalaguete	47 municipalities
EO 97 (1916)		Madridejos	separated from Bantayan	48 municipalities
EO 2 (1918)	1918-01-01	Santander	separated from Oslob	49 municipalities
EO 5 (1919)	1919-01-01	Compostela	separated from Liloan	50 municipalities
EO 10 (1920)	1920-01-01	Consolacion	separated from Mandaue	51 municipalities
EO 43 (1920)	1921-01-01	Sogod	separated from Catmon	52 municipalities
CA 58	1936-10-20	City of Cebu	converted from municipality	1 city, 51 municipalities
EO 621 (1953)	1953-09-23	Tabuelan	separated from Tuburan Seat of govt: Bo. Tabuelan	1 city, 52 municipalities
RA 2688	1960-06-18	City of Toledo	converted from municipality	2 cities, 51 municipalities
RA 3028	1961-06-07	Danao City		3 cities, 50 municipalities
RA 3134	1961-06-17	City of Lapu-Lapu	• renamed from Opon • converted from municipality	4 cities, 49 municipalities
RA 5519	1969-08-30	City of Mandaue	converted from municipality	5 cities, 48 municipalities
RA 8979	2000-12-30	City of Talisay		6 cities, 47 municipalities
RA 9390	2007-06-16	City of Bogo		7 cities, 46 municipalities
RA 9436	2007-07-01	City of Carcar		8 cities, 45 municipalities
RA 9491	2007-09-02	City of Naga		9 cities, 44 municipalities

Leyte

Legal basis	Effective Date	Local government unit	Actions	Statistics
Act 121	1901-04-22		Leyte organized under Act 83
Act 954	1903-10-22	Dagami, Pastrana, Tabontabon, Sogod Sur, Sogod Norte, Malitbog, Macrohon, Maasin, Matalom, Cajagnaan, Ormoc, Albuera, Merida, Quiot, San Isidro, Villaba, Tabango, Naval, Biliran, Caibiran, Culaba, Cabucgayan, Almeria, Maripipi, Carigara, Capoocan, Babatngon, Malibago, Alangalang, San Miguel, Tacloban, Palo, Tanauan, Tolosa, Dulag, Abuyog, Cabalian, Liloan, San Ricardo, Bato, Hilongos, Hindang, Inopacan, Baybay, Palompon, Leyte, Jaro, Barugo, Burauen	reduced 49 municipalities to 33: • Pastrana, Tabontabon merged into Dagami • Sogod Norte merged into Sogod Sur • Macrohon (part) merged into Malitbog • Macrohon (part) merged into Maasin • Cajagnaan merged into Matalom • Quiot merged into Merida • Villaba, Tabango, Naval (part) merged into San Isidro • Biliran merged into Naval • Culaba, Cabucgayan merged into Caibiran • Maripipi merged into Almeria • Capoocan merged into Carigara • Malibago merged into Babatngon • San Miguel merged into Alangalang	33 municipalities
Act 986	1903-11-07	Hinunangan, Hinundayan	amended Act 954: “reduced 51 municipalities to 34” • Hinundayan merged into Hinunangan	34 municipalities
Act 1477	1906-04-17	Sogod	renamed from Sogod Sur
Act 1616	1907-03-19	Kawayan	renamed from Almeria Seat of govt: Bo. Kawayan
		Pintuyan	renamed from San Ricardo Seat of govt: Bo. Pintuyan
EO 34 (1908)	1908-06-01	Macrohon	separated from Maasin, Malitbog	35 municipalities
EO 59 (1909)	1910-01-01	Villaba	separated from San Isidro	37 municipalities
		Hinundayan	separated from Hinunangan
EO 75 (1909), EO 85 (1909), EO 144 (1909)	1910-01-01	Biliran	separated from Naval	38 municipalities
EO 81 (1909)		San Miguel	separated from Alangalang	39 municipalities
EO 85 (1911)	1912-01-01	Pastrana	separated from Dagami	40 municipalities
EO 12 (1912)	1913-01-01	Sogod Sur	separated from Sogod	41 municipalities
		Sogod Norte	renamed from Sogod
Act 2290	1913-11-04	Sogod	renamed from Sogod Norte
		Libagon	renamed from Sogod Sur
EO 101 (1914)	1915-01-01	Maripipi	separated from Kawayan	42 municipalities
EO 87 (1917)	1918-01-01	Capoocan	separated from Carigara	43 municipalities
EO 90 (1917)		La Paz	separated from Burauen	44 municipalities
EO 99 (1917)	1918-01-01	Albuera	separated from Ormoc	45 municipalities
EO 4 (1919)	1919-01-01	Calubian	separated from Leyte, San Isidro	45 46 municipalities
EO 219 (1929)	1930-12-31	Delgado	separated from Hinundayan Seat of govt: Bo. Anahawan	47 municipalities
Act 3705	1931-01-01	Anahawan	renamed from Delgado
RA 179	1947-10-20	Ormoc City	converted from municipality	1 city, 46 municipalities
RA 191	1948-01-15	Isabel	separated from Merida Seat of govt: Bo. Quiot	1 city, 47 municipalities
EO 162 (1948)	1948-09-01	Almeria	separated from Kawayan, Biliran, Naval	1 city, 48 municipalities
EO 266 (1949)	1949-09-24	Tunga	separated from Barugo Seat of govt: Bo. Tunga	1 city, 49 municipalities
EO 277 (1949)	1949-10-10	Santa Fe	separated from Palo Seat of govt: Bo. Santa Fe	1 city, 50 municipalities
EO 271 (1949)	1949-11-15	Cabucgayan	separated from Biliran, Caibiran	1 city, 51 municipalities
EO 278 (1949)	1949-10-10	Julita	separated from Burauen Seat of govt: Bo. Julita	1 city, 52 municipalities
EO 284 (1949)	1949-10-15	Tabango	separated from San Isidro, Leyte	1 city, 53 municipalities
EO 292 (1949)	1949-11-01	San Francisco	separated from Liloan Seat of govt: Bo. San Francisco	1 city, 54 municipalities
RA 522	1950-06-15	Bontoc	separated from Sogod Seat of govt: Bo. Bontoc	1 city, 55 municipalities
RA 542	1950-06-17	Kananga	separated from Ormoc City	1 city, 56 municipalities
EO 324 (1950)		MacArthur	separated from Abuyog Seat of govt: Bo. Tarragona	1 city, 57 municipalities
RA 760	1952-06-20	City of Tacloban	converted from municipality	2 cities, 56 municipalities
EO 326 (1950)		Silago	separated from Hinunganan Seat of govt: Bo. Silago	2 cities, 57 municipalities
EO 630 (1953)	1953-10-16	Culaba	separated from Caibiran	2 cities, 58 municipalities
EO 631 (1953)	1953-10-17	Tabontabon	separated from Dagami	2 cities, 59 municipalities
EO 84 (1954)	1954-12-09	Saint Bernard	separated from Cabalian Seat of govt: Bo. Himatagon	2 cities, 60 municipalities
RA 1220	1955-05-11	Mayorga	separated from Dulag	2 cities, 61 municipalities
RA 1614	1957-05-20	Matag-ob	separated from Palompon	2 cities, 62 municipalities
EO 265 (1957)	1957-08-29	Padre Burgos	separated from Malitbog Seat of govt: Bo. Burgos	2 cities, 63 municipalities
EO 308 (1958)	1958-07-21	Mahaplag	separated from Abuyog Seat of govt: Bo. Mahaplag	2 cities, 64 municipalities
RA 2141	1959-04-08	(Almeria, Biliran, Cabucgayan, Caibiran, Culaba, Kawayan, Maripipi, Naval)	Subprovince of Biliran created
RA 2227	1960-07-01	Maasin, Macrohon, Padre Burgos, Malitbog, Bontoc, Sogod, Libagon, Liloan, Pintuyan, San Francisco, Saint Bernard, Cabalian, Anahawan, Hinundayan, Hinunangan, Silago	separated to create Southern Leyte	2 cities, 48 municipalities
RA 3422	1963-11-12	Bugho	separated from Abuyog Seat of govt: Bo. Bugho	2 cities, 49 municipalities
RA 4365	1965-06-19	Javier	renamed from Bugho
RA 7160 §462	1992-05-11	Almeria, Biliran, Cabucgayan, Caibiran, Culaba, Kawayan, Maripipi, Naval	• Subprovince of Biliran converted into province • separated from Leyte	2 cities, 41 municipalities
RA 9389	2007-06-16	City of Baybay	converted from municipality	3 cities, 40 municipalities

Southern Leyte

Legal basis	Effective Date	Local government unit	Actions	Statistics
RA 2227	1960-07-01	Maasin, Macrohon, Padre Burgos, Malitbog, Bontoc, Sogod, Libagon, Liloan, Pintuyan, San Francisco, Saint Bernard, Cabalian, Anahawan, Hinundayan, Hinunangan, Silago	Southern Leyte created from Leyte	16 municipalities
RA 3088	1961-06-17	San Juan	renamed from Cabalian
RA 5777	1969-06-21	Tomas Oppus	separated from Malitbog Seat of govt: Bo. San Isidro	17 municipalities
RA 6360	1971-07-22	San Ricardo	separated from Pintuyan Seat of govt: Bo. San Ricardo	18 municipalities
PD 1549	1978-06-11	Limasawa	separated from Padre Burgos Seat of govt: Bo. Triana	19 municipalities
RA 8796	2000-08-10	City of Maasin	converted from municipality	1 city, 18 municipalities

Biliran

Legal basis	Effective Date	Local government unit	Actions	Statistics
RA 7160 §462	1992-05-11	Almeria, Biliran, Cabucgayan, Caibiran, Culaba, Kawayan, Maripipi, Naval	• converted from subprovince • separated from Leyte	8 municipalities

Samar

Legal Basis	Effective Date	Local government units	Actions	Statistics
Act 419	1902-06-17		province of Samar organized under Act 83
Act 960, Act 1068*	1903-10-23	Jiabong, Tarangnan, Catbalogan, Gandara, Motiong, San Sebastian, Paranas/Wright, Santa Margarita*, Weyler, Calbayog, Santo Niño, Almagro, Oquendo, San Antonio, La Granja/Allen, Capul, Lavezares, Bobon, Mondragon, Catarman, Pambujan, Laoang, Catubig, Palapag, Oras, Paric, Sulat, San Julian, Tubig/Taft, Borongan, Hernani, Lanang/Llorente, Mercedes, Salcedo, Guiuan, Quinapondan, Balangiga, Basey, Santa Rita, Villarreal, Pinabacdao, Calbiga, Zumarraga	reduced 43 municipalities to 25: • Jiabong, Tarangnan (1/2 part) merged into Catbalogan • Tarangnan (2/2 part) merged into Gandara • Paranas, Motiong, San Sebastian merged into Wright • Santa Margarita*, Weyler merged into Calbayog • San Antonio, La Granja merged into Allen • Bobon, Mondragon merged into Catarman • Paric, Sulat, San Julian, Tubig merged into Taft • Hernani, Lanang merged into Llorente • Mercedes, Salcedo merged into Guiuan • Quinapondan merged into Balangiga • Santa Rita (1/2 part) merged into Basey • Santa Rita (2/2 part)(part) merged into Villareal • Pinabacdao merged into Calbiga • Villareal (part) merged into Zumarraga	25 municipalities
Act 1558	1906-10-31	Tarangnan, San Antonio, Bobon, Dolores, Sulat, San Julian, Santa Rita	increased 25 municipalities to 32: • Tarangnan separated from Catbalogan, Samar • San Antonio separated from Allen • Bobon separated from Catarman • Paric, Sulat, San Julian separated from Taft • Santa Rita separated from Basey, Villareal • Paric renamed to Dolores	32 municipalities
EO 110 (1908)	1909-01-01	Santa Margarita	separated from Calbayog	34 municipalities
		Salcedo	seprated from Guiuan
EO 72 (1910)	1911-01-01	Tinambacan	• separated from Calbayog • renamed from Weyler	35 municipalities
EO 82 (1911)	1912-01-01	Mondragon	separated from Catarman	36 municipalities
EO 7 (1912)	1913-01-01	Hernani	separated from Llorente	37 municipalities
EO 36 (1919)	1919-03-05	Municipal districts of Matuguinao, San Jose de Buan, Concord, Hinabangan, Maslog, Jipapad, Tagaslian	converted from settlements	37 municipalities, 7 municipal districts
EO 146 (1928)	1929-01-01	Municipal district of Tagaslian	merged into Borongan	37 municipalities, 6 municipal districts
EO 2 (1946)	1946-07-16	Pinabacdao	separated from Calbiga	38 municipalities, 6 municipal districts
RA 61	1946-10-17	Quinapondan	separated from Balangiga	39 municipalities, 6 municipal districts
RA 90	1946-10-17	Gamay	separated from Palapag	40 municipalities, 6 municipal districts
RA 192	1947-06-22	Talalora	separated from Villareal	41 municipalities, 6 municipal districts
RA 193	1947-06-22	General MacArthur	separated from Palapag	42 municipalities, 6 municipal districts
RA 262	1948-06-15	Mercedes	separated from Guiuan	43 municipalities, 6 municipal districts
RA 263	1948-10-15	Municipal district of Concord, Hinabangan	• converted from municipal district • Municipal district of Concord merged into Hinabangan	44 municipalities, 4 municipal districts
RA 264	1948-07-04	Can-avid	separated from Dolores	45 municipalities, 4 municipal districts
RA 269	1948-10-15	Jiabong	separated from Catbalogan	46 municipalities, 4 municipal districts
RA 281	1948-06-16	San Policarpo	separated from Oras	47 municipalities, 4 municipal districts
RA 290	1948-10-15	Motiong	separated from Wright	48 municipalities, 4 municipal districts
RA 328	1948-10-16	City of Calbayog	• Oquendo, Tinambacan merged into Calbayog • converted from municipality	1 city, 41 municipalities, 4 municipal districts
EO 238 (1949)	1949-07-08	Las Navas	separated from Catubig	1 city, 42 municipalities, 4 municipal districts
EO 247 (1949)	1949-07-22	Marabut	separated from Basey Seat of govt: Bo. Santo Niño
EO 248 (1949)	1949-07-25	San Jose	separated from Bobon
EO 255 (1949)	1949-08-19	Giporlos	separated from Balangiga Seat of govt: Bo. Giporlos
EO 262 (1949)	1949-09-01	Daram	separated from Zumarraga Seat of govt: Bo. Daram
RA 543	1950-09-30	San Sebastian	separated from Wright
RA 607	1951-04-27	Arteche	separated from Oras Seat of govt: Bo. San Ramon
RA 609	1951-05-01	Maydolong	separated from Borongan Seat of govt: Bo. Maydolong
RA 1887	954-06-20	San Isidro	separated from Allen
RA 1428	1956-06-14	Lapinig	separated from Oras, Gamay, Municipal district of Jipapad Seat of govt: Bo. Lapinig
RA 2102	1959-03-28	San Roque	separated from Pambujan Seat of govt: Bo. Lao-angan
RA 2181	1959-05-02	Balangkayan	separated from Llorente Seat of govt: Bo. Balangkayan
RA 2185	1959-05-07	Lawa-an	separated from Balangiga Seat of govt: Bo. Lawa-an</small
EO 157 (1965)	1964-07-01	Jipapad	converted from municipal district
RA 4221	1965-06-19	Allen, Bobon, Capul, Catarman, Catubig, Gamay, Laoang, Lapinig, Las Navas, Lavezares, Mondragon, Palapag, Pambujan, San Antonio, San Isidro, San Jose, San Roque	Northern Samar	17 municipalities
		Arteche, Balangiga, Balangkayan, Borongan, Can-avid, Dolores, General MacArthur, Giporlos, Guiuan, Hernani, Jipapad, Lawa-an, Llorente, Maslog, Maydolong, Mercedes, Oras, Quinapondan, Salcedo, San Julian, San Policarpo, Sulat, Taft	Eastern Samar	23 municipalities
		Basey, Calbiga, Catbalogan, Daram, Gandara, Santa Margarita, Hinabangan, Jiabong, Marabut, Motiong, Pinabacdao, Santa Rita, Talalora, Tarangnan, Villareal, Wright, Zumarraga, Matuguinao, San Jose de Buan, San Sebastian, Almagro, Santo Niño	Western Samar	22 municipalities

Northern Samar

Legal Basis	Effective Date	Local government units	Actions	Statistics
RA 4221	1965-06-19	Allen, Bobon, Capul, Catarman, Catubig, Gamay, Laoang, Lapinig, Las Navas, Lavezares, Mondragon, Palapag, Pambujan, San Antonio, San Isidro, San Jose, San Roque	Northern Samar	17 municipalities
RA 4742	1966-06-18	Mapanas	separated from Gamay Seat of govt: Bo. Mapanas	18 municipalities
RA 4761	1966-06-18	San Vicente	separated from Capul Seat of govt: Bo. Mongolbongol	19 municipalities
RA 4978	1967-06-17	Silvino Lobos	separated from Pambujan, Matuguinao Seat of govt: Bo. Suba	20 municipalities
RA 5193	1968-04-27	Victoria	separated from Allen Seat of govt: Bo. Mawo	21 municipalities
RA 5500	1969-06-21	Biri	separated from Bobon Seat of govt: Bo. Biri	22 municipalities
RA 5867		Rosario	separated from San Jose Seat of govt: Bo. Rosario	23 municipalities
BP 69	1980-05-01	Lope de Vega	separated from Catarman Seat of govt: Bo. Lope de Vega	24 municipalities

Eastern Samar

Legal Basis	Effective Date	Local government units	Actions	Statistics
RA 4221	1965-06-19	Arteche, Balangiga, Balangkayan, Borongan, Can-avid, Dolores, General MacArthur, Giporlos, Guiuan, Hernani, Jipapad, Lawaan, Llorente, Maslog, Maydolong, Mercedes, Oras, Quinapondan, Salcedo, San Julian, San Policarpo, Sulat, Taft	Eastern Samar	23 municipalities
RA 9394	2007-06-20	City of Borongan	converted from municipality	1 city, 22 municipalities

Western Samar

Legal Basis	Effective Date	Local government units	Actions	Statistics
RA 4221	1965-06-19	Basey, Calbiga, Catbalogan, Daram, Gandara, Santa Margarita, Hinabangan, Jiabong, Marabut, Motiong, Pinabacdao, Santa Rita, Talalora, Tarangnan, Villareal, Wright, Zumarraga, Matuguinao, San Jose de Buan, San Sebastian, Almagro, Santo Niño, (Calbayog)	Western Samar	1 city, 21 municipalities, 1 municipal district
RA 5650	1969-06-21		Western Samar renamed to Samar
RA 5868		San Jose de Buan	converted from municipal district	1 city, 22 municipalities
RA 5970	1970-01-01	Tagapul-an	separated from Almagro Seat of govt: Bo. Sogod	1 city, 23 municipalities
BP 11	1978-12-06	San Jorge	separated from Gandara Seat of govt: Bo. San Jorge	1 city, 24 municipalities
BP 16	1979-02-09	Pagsanghan	separated from Tarangnan Seat of govt: Bo. Pagsanghan	1 city, 25 municipalities
RA 6681	1988-11-04	Paranas	renamed from Wright
RA 9391	2007-06-16	City of Catbalogan	converted from municipality	2 cities, 24 municipalities