Classification: County
Located in: Illinois (IL)
Total Population (2000): 15452
Total Housing Units (2000): 7014
Land Area (square meters): 963433244
Water Area (square meters): 5076462
Land Area (square miles): 371.983671
Water Area (square miles): 1.960033
Latitude (decimal degrees): 38.72377
Longitude (decimal degrees): -87.720031
FIPS Code: 17
Place FIPS Code: 101