Classification: County
Located in: Illinois (IL)
Total Population (2000): 15161
Total Housing Units (2000): 6951
Land Area (square meters): 619145951
Water Area (square meters): 7935615
Land Area (square miles): 239.053598
Water Area (square miles): 3.063958
Latitude (decimal degrees): 37.203007
Longitude (decimal degrees): -88.742654
FIPS Code: 17
Place FIPS Code: 127