Keith Dewhurst (born 24 December 1931) is an English playwright and film and television scriptwriter.
Born in Oldham, Keith Dewhurst was educated at Rydal School and Peterhouse, Cambridge, graduating with a B.A. in English in 1953. After working as a yarn tester for Lancashire Cotton Corporation, he worked for the Manchester Evening Chronicle from 1955 to 1959, as their reporter on Manchester United.
Dewhurst has written television plays since 1960, and plays for the theatre since the late 1960s. He has also written radio plays and a couple of novels. His non-fiction Underdogs (2012) tells the story of Darwen FC's long run in the 1879 F.A. Cup.