Classification: County
Located in: Illinois (IL)
Total Population (2000): 34264
Total Housing Units (2000): 13959
Land Area (square meters): 1239826162
Water Area (square meters): 3115242
Land Area (square miles): 478.699578
Water Area (square miles): 1.202802
Latitude (decimal degrees): 39.069653
Longitude (decimal degrees): -88.59228
FIPS Code: 17
Place FIPS Code: 49