Classification: County
Located in: Illinois (IL)
Total Population (2000): 23094
Total Housing Units (2000): 9457
Land Area (square meters): 1142083828
Water Area (square meters): 15153833
Land Area (square miles): 440.96105
Water Area (square miles): 5.850928
Latitude (decimal degrees): 38.054426
Longitude (decimal degrees): -89.349016
FIPS Code: 17
Place FIPS Code: 145