Delaware -- U.S. County in Oklahoma Population (2000): 37077 Housing Units (2000): 22290 Land area (2000): 740.650086 sq. miles (1918.274834 sq. km) Water area (2000): 51.675711 sq. miles (133.839471 sq. km) Total area (2000): 792.325797 sq. miles (2052.114305 sq. km) Located within: Oklahoma (OK), FIPS 40 Location: 36.468076 N, 94.815869 W Headwords: Delaware Delaware, OK Delaware County Delaware County, OK