Andrew Neiderman (born October 26, 1940 in Brooklyn, N.Y.), is a best-selling American novelist. In 1987, he became the ghost writer for V. C. Andrews following her death in 1986. He formerly taught English at Fallsburg Jr./Sr. High School, in upstate New York.

Neiderman is arguably best known as the author of The Devil's Advocate, later adapted into the film The Devil's Advocate starring Keanu Reeves, Al Pacino, Charlize Theron, and directed by Taylor Hackford. He is the screenwriter who adapted Rain, based on a series of novels released under Andrews' name.

Neiderman wrote the stage adaptation of Flowers in the Attic based on the novel by V.C. Andrews, published online in 2014, and produced in a critically acclaimed world premiere production in New Orleans, Louisiana in August 2015. The play was produced by See 'Em On Stage: A Production Company and was directed by Christopher Bentivegna.

Andrew Neiderman has written the libretto for a musical stage adaptation of The Devil's Advocate.