Carroll -- U.S. County in Iowa Population (2000): 21421 Housing Units (2000): 9019 Land area (2000): 569.312687 sq. miles (1474.513028 sq. km) Water area (2000): 0.923777 sq. miles (2.392571 sq. km) Total area (2000): 570.236464 sq. miles (1476.905599 sq. km) Located within: Iowa (IA), FIPS 19 Location: 42.028619 N, 94.855710 W Headwords: Carroll Carroll, IA Carroll County Carroll County, IA