T. Coraghessan Boyle (born Thomas John Boyle, Jr.) is an American novelist and short story writer. Since the mid-1970s, he has published nineteen novels and more than 150 short stories. He won the PEN/Faulkner Award in 1988 for his third novel, World's End, which recounts 300 years in upstate New York.

He has been a Distinguished Professor of English at the University of Southern California and founded the school's undergraduate creative writing program in 1978. Boyle grew up in a small town in the Hudson Valley that he fictionalizes as Peterskill in his works, such as the widely anthologized short story Greasy Lake.

Boyle changed his middle name when he was 17 and has exclusively used Coraghessan for much of his career. He is married and has three children.