Warren -- U.S. County in Indiana Population (2000): 8419 Housing Units (2000): 3477 Land area (2000): 364.883000 sq. miles (945.042591 sq. km) Water area (2000): 1.717132 sq. miles (4.447350 sq. km) Total area (2000): 366.600132 sq. miles (949.489941 sq. km) Located within: Indiana (IN), FIPS 18 Location: 40.311628 N, 87.362680 W Headwords: Warren Warren, IN Warren County Warren County, IN