A lieutenant governor, lieutenant-governor, or vice governor is a high officer of state, whose precise role and rank vary by jurisdiction, but is often the deputy or lieutenant to or ranking under a governor — a "second-in-command". In many Commonwealth of Nations states, a lieutenant governor is the representative of the monarch and acts as the nominal chief executive officer of the realm, although by convention the lieutenant governor delegates actual executive power to the premier of a province. The Dutch political system also includes and has included lieutenant governors, who act as executors of overseas possessions. In India, lieutenant governors are in charge of special administrative divisions in that country.

In the United States, lieutenant governors are usually second-in-command to a state governor, and the actual power held by the lieutenant governor varies greatly from state to state.

Lieutenant governors in the former British Empire