Dearborn -- U.S. County in Indiana Population (2000): 46109 Housing Units (2000): 17791 Land area (2000): 305.212281 sq. miles (790.496144 sq. km) Water area (2000): 1.837766 sq. miles (4.759793 sq. km) Total area (2000): 307.050047 sq. miles (795.255937 sq. km) Located within: Indiana (IN), FIPS 18 Location: 39.135699 N, 84.943303 W Headwords: Dearborn Dearborn, IN Dearborn County Dearborn County, IN