Sentinel, OK -- U.S. town in Oklahoma Population (2000): 859 Housing Units (2000): 411 Land area (2000): 0.614016 sq. miles (1.590293 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.614016 sq. miles (1.590293 sq. km) FIPS code: 66400 Located within: Oklahoma (OK), FIPS 40 Location: 35.156659 N, 99.173829 W ZIP Codes (1990): 73664 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Sentinel, OK Sentinel