Cromwell, OK -- U.S. town in Oklahoma Population (2000): 265 Housing Units (2000): 113 Land area (2000): 1.069698 sq. miles (2.770506 sq. km) Water area (2000): 0.003265 sq. miles (0.008456 sq. km) Total area (2000): 1.072963 sq. miles (2.778962 sq. km) FIPS code: 18450 Located within: Oklahoma (OK), FIPS 40 Location: 35.350195 N, 96.459700 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Cromwell, OK Cromwell