Lee -- U.S. County in Illinois Population (2000): 36062 Housing Units (2000): 14310 Land area (2000): 725.363845 sq. miles (1878.683655 sq. km) Water area (2000): 3.922337 sq. miles (10.158806 sq. km) Total area (2000): 729.286182 sq. miles (1888.842461 sq. km) Located within: Illinois (IL), FIPS 17 Location: 41.774245 N, 89.352013 W Headwords: Lee Lee, IL Lee County Lee County, IL