Gregory, OK -- U.S. Census Designated Place in Oklahoma Population (2000): 150 Housing Units (2000): 55 Land area (2000): 3.014063 sq. miles (7.806386 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 3.014063 sq. miles (7.806386 sq. km) FIPS code: 31425 Located within: Oklahoma (OK), FIPS 40 Location: 36.165593 N, 95.574186 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Gregory, OK Gregory