Summit -- U.S. County in Ohio Population (2000): 542899 Housing Units (2000): 230880 Land area (2000): 412.723297 sq. miles (1068.948386 sq. km) Water area (2000): 7.338126 sq. miles (19.005659 sq. km) Total area (2000): 420.061423 sq. miles (1087.954045 sq. km) Located within: Ohio (OH), FIPS 39 Location: 41.095605 N, 81.520637 W Headwords: Summit Summit, OH Summit County Summit County, OH