Douglas Arthur Gerhart (born November 23, 1936) is a former American football coach and player.
He served as head football coach at Occidental College from 1967 to 1969, compiling a record of 8–17–1.
Gerhart was the offensive coordinator at Colorado State University from 1973 to 1974.
He worked as an assistant coach for several teams in the National Football League (NFL) between 1975 and 1979: the Cleveland Browns, San Francisco 49ers, Detroit Lions, and Chicago Bears.