Jackson -- U.S. County in Indiana Population (2000): 41335 Housing Units (2000): 17137 Land area (2000): 509.314798 sq. miles (1319.119215 sq. km) Water area (2000): 4.438613 sq. miles (11.495954 sq. km) Total area (2000): 513.753411 sq. miles (1330.615169 sq. km) Located within: Indiana (IN), FIPS 18 Location: 38.917112 N, 85.979889 W Headwords: Jackson Jackson, IN Jackson County Jackson County, IN