Classification: County
Located in: Illinois (IL)
Total Population (2000): 111509
Total Housing Units (2000): 46438
Land Area (square meters): 2939419691
Water Area (square meters): 33986314
Land Area (square miles): 1134.916336
Water Area (square miles): 13.12219
Latitude (decimal degrees): 41.332155
Longitude (decimal degrees): -88.904285
FIPS Code: 17
Place FIPS Code: 99