Monroe -- U.S. County in Iowa Population (2000): 8016 Housing Units (2000): 3588 Land area (2000): 433.405403 sq. miles (1122.514792 sq. km) Water area (2000): 0.700158 sq. miles (1.813400 sq. km) Total area (2000): 434.105561 sq. miles (1124.328192 sq. km) Located within: Iowa (IA), FIPS 19 Location: 41.036610 N, 92.840674 W Headwords: Monroe Monroe, IA Monroe County Monroe County, IA