Classification: County
Located in: Illinois (IL)
Total Population (2000): 61296
Total Housing Units (2000): 27703
Land Area (square meters): 1096636941
Water Area (square meters): 54291615
Land Area (square miles): 423.413908
Water Area (square miles): 20.962111
Latitude (decimal degrees): 37.74923
Longitude (decimal degrees): -88.972314
FIPS Code: 17
Place FIPS Code: 199