Madison -- U.S. County in Indiana Population (2000): 133358 Housing Units (2000): 56939 Land area (2000): 452.129866 sq. miles (1171.010928 sq. km) Water area (2000): 0.780821 sq. miles (2.022316 sq. km) Total area (2000): 452.910687 sq. miles (1173.033244 sq. km) Located within: Indiana (IN), FIPS 18 Location: 40.145940 N, 85.719201 W Headwords: Madison Madison, IN Madison County Madison County, IN