Marshall -- U.S. County in Indiana Population (2000): 45128 Housing Units (2000): 18099 Land area (2000): 444.274480 sq. miles (1150.665571 sq. km) Water area (2000): 5.650003 sq. miles (14.633440 sq. km) Total area (2000): 449.924483 sq. miles (1165.299011 sq. km) Located within: Indiana (IN), FIPS 18 Location: 41.331349 N, 86.268543 W Headwords: Marshall Marshall, IN Marshall County Marshall County, IN