Cass -- U.S. County in Iowa Population (2000): 14684 Housing Units (2000): 6590 Land area (2000): 564.328727 sq. miles (1461.604630 sq. km) Water area (2000): 0.679775 sq. miles (1.760610 sq. km) Total area (2000): 565.008502 sq. miles (1463.365240 sq. km) Located within: Iowa (IA), FIPS 19 Location: 41.358575 N, 94.965991 W Headwords: Cass Cass, IA Cass County Cass County, IA