Classification: County
Located in: Illinois (IL)
Total Population (2000): 16365
Total Housing Units (2000): 6798
Land Area (square meters): 1139651250
Water Area (square meters): 808703
Land Area (square miles): 440.021826
Water Area (square miles): 0.312242
Latitude (decimal degrees): 39.997207
Longitude (decimal degrees): -88.577414
FIPS Code: 17
Place FIPS Code: 147