Gerald James Michael Gazdar (born 24 February 1950) is a linguist and computer scientist.
He was educated at Bradfield College and subsequently graduated from the University of East Anglia with a BA in 1970, and from the University of Reading where he completed his master's degree in 1972 and his PhD in 1976. He became a lecturer at the University of Sussex in 1975, and became Professor of Computational Linguistics there in 1985. He retired in 2002.
Along with his colleagues Ewan Klein, Geoffrey Pullum and Ivan Sag, Gazdar pioneered Generalized Phrase Structure Grammar.