Classification: County
Located in: Illinois (IL)
Total Population (2000): 16149
Total Housing Units (2000): 7468
Land Area (square meters): 932763611
Water Area (square meters): 4838953
Land Area (square miles): 360.142059
Water Area (square miles): 1.86833
Latitude (decimal degrees): 38.7222
Longitude (decimal degrees): -88.094535
FIPS Code: 17
Place FIPS Code: 159