Oak Grove, OK -- U.S. town in Oklahoma Population (2000): 18 Housing Units (2000): 9 Land area (2000): 0.130469 sq. miles (0.337914 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.130469 sq. miles (0.337914 sq. km) FIPS code: 53210 Located within: Oklahoma (OK), FIPS 40 Location: 36.208307 N, 96.338113 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Oak Grove, OK Oak Grove