Summit -- U.S. County in Utah Population (2000): 29736 Housing Units (2000): 17489 Land area (2000): 1871.047522 sq. miles (4845.990629 sq. km) Water area (2000): 10.998556 sq. miles (28.486127 sq. km) Total area (2000): 1882.046078 sq. miles (4874.476756 sq. km) Located within: Utah (UT), FIPS 49 Location: 40.828522 N, 111.273030 W Headwords: Summit Summit, UT Summit County Summit County, UT