Carroll -- U.S. County in Indiana Population (2000): 20165 Housing Units (2000): 8675 Land area (2000): 372.257984 sq. miles (964.143712 sq. km) Water area (2000): 2.796687 sq. miles (7.243387 sq. km) Total area (2000): 375.054671 sq. miles (971.387099 sq. km) Located within: Indiana (IN), FIPS 18 Location: 40.580759 N, 86.584006 W Headwords: Carroll Carroll, IN Carroll County Carroll County, IN