John Hemphill

John Hemphill may refer to:


 * John A. Hemphill (1927-2021), United States Army general
 * John Hemphill (actor) (born 1953), Canadian comic actor, writer, and producer
 * John Hemphill (senator) (1803–1862), American politician and judge
 * John J. Hemphill (1849–1912), American politician