Martin S. Villarama Jr. (born April 14, 1946) is a Filipino lawyer who served as Associate Justice of the Supreme Court of the Philippines from November 3, 2009, to January 16, 2016. Prior to his appointment as Associate Justice of the Supreme Court, he served as Associate Justice of the Court of Appeals since March 11, 1998. He also served in the Regional Trial Court of Pasig as Judge from 1986 to 1998 and as its Executive Judge from 1992 to 1996.