Classification: County
Located in: Illinois (IL)
Total Population (2000): 8213
Total Housing Units (2000): 4126
Land Area (square meters): 981118459
Water Area (square meters): 42248329
Land Area (square miles): 378.811971
Water Area (square miles): 16.312172
Latitude (decimal degrees): 40.833378
Longitude (decimal degrees): -90.94634
FIPS Code: 17
Place FIPS Code: 71