Gregory Frost (born May 13, 1951) is an American author of science fiction and fantasy, and directs a fiction writing workshop at Swarthmore College in Swarthmore, Pennsylvania.

[2] A graduate of the Clarion Workshop, he has been invited back as instructor several times, including the first session following its move to the University of California at San Diego in 2007.

Author Orson Scott Card called Frost's novel Tain "a marvelous straightforward retelling of an ancient national myth.

Gregory Frost is a founding partner of The Liars Club, a networking group of professionals in publishing and other aspects of entertainment that includes Jonathan Maberry, Jon McGoran, Kelly Simmons, Dennis Tafoya, Merry Jones, Keith R.A. DeCandido, Don Lafferty, Marie Lamba, Keith Strunk, and Edward Pettit.

——————— Frost had roles in two microbudget horror films, as "Frost" (essentially himself) in S. P. Somtow's 1989 The Laughing Dead and as "Butcher Deacon #2" in John R. Ellis's Twilight of the Dogs (1995), both starring his friend and fellow writer Tim Sullivan.