Tazewell -- U.S. County in Illinois Population (2000): 128485 Housing Units (2000): 52973 Land area (2000): 648.860160 sq. miles (1680.540029 sq. km) Water area (2000): 9.032295 sq. miles (23.393536 sq. km) Total area (2000): 657.892455 sq. miles (1703.933565 sq. km) Located within: Illinois (IL), FIPS 17 Location: 40.557333 N, 89.540657 W Headwords: Tazewell Tazewell, IL Tazewell County Tazewell County, IL