Hamilton -- U.S. County in Indiana Population (2000): 182740 Housing Units (2000): 69478 Land area (2000): 397.939853 sq. miles (1030.659443 sq. km) Water area (2000): 4.787720 sq. miles (12.400138 sq. km) Total area (2000): 402.727573 sq. miles (1043.059581 sq. km) Located within: Indiana (IN), FIPS 18 Location: 40.031229 N, 86.065824 W Headwords: Hamilton Hamilton, IN Hamilton County Hamilton County, IN