Classification: County
Located in: Illinois (IL)
Total Population (2000): 13180
Total Housing Units (2000): 5914
Land Area (square meters): 999896316
Water Area (square meters): 32253288
Land Area (square miles): 386.062142
Water Area (square miles): 12.453065
Latitude (decimal degrees): 41.048508
Longitude (decimal degrees): -89.295467
FIPS Code: 17
Place FIPS Code: 123