Foster is a town in Garvin County, Oklahoma, United States. It was incorporated in 2002 and had an estimated population of 124 in 2007.
Foster is served by State Highway 29A, a spur of State Highway 29. A post office was first established at Foster on August 12, 1891.
There is a cemetery located at 34°36′14″N 97°29′38″W / 34.60389°N 97.49389°W / 34.60389; -97.49389 .