Classification: County
Located in: Illinois (IL)
Total Population (2000): 53196
Total Housing Units (2000): 22768
Land Area (square meters): 1316453530
Water Area (square meters): 4615587
Land Area (square miles): 508.285571
Water Area (square miles): 1.782088
Latitude (decimal degrees): 39.507634
Longitude (decimal degrees): -88.259377
FIPS Code: 17
Place FIPS Code: 29