Contra Costa -- U.S. County in California Population (2000): 948816 Housing Units (2000): 354577 Land area (2000): 719.946043 sq. miles (1864.651611 sq. km) Water area (2000): 82.203697 sq. miles (212.906588 sq. km) Total area (2000): 802.149740 sq. miles (2077.558199 sq. km) Located within: California (CA), FIPS 06 Location: 37.942423 N, 122.060886 W Headwords: Contra Costa Contra Costa, CA Contra Costa County Contra Costa County, CA