John Winslow Irving (born John Wallace Blunt Jr.; March 2, 1942) is an American novelist and screenwriter.

Irving achieved critical and popular acclaim after the international success of The World According to Garp in 1978. Many of Irving's novels, including The Cider House Rules (1985), A Prayer for Owen Meany (1989), and A Widow for One Year (1998) have been bestsellers. He won the Academy Award for Best Adapted Screenplay in the 72nd Academy Awards (1999) for his script of The Cider House Rules.

Five of his novels have been adapted into films (Garp, Hotel, Meany, Cider, Widow). Several of Irving's books (Garp, Meany, Widow) and short stories have been set in and around Phillips Exeter Academy in the town of Exeter, New Hampshire.