Hancock -- U.S. County in Iowa Population (2000): 12100 Housing Units (2000): 5164 Land area (2000): 571.110045 sq. miles (1479.168162 sq. km) Water area (2000): 2.034402 sq. miles (5.269077 sq. km) Total area (2000): 573.144447 sq. miles (1484.437239 sq. km) Located within: Iowa (IA), FIPS 19 Location: 43.085526 N, 93.722060 W Headwords: Hancock Hancock, IA Hancock County Hancock County, IA