Classification: County
Located in: Illinois (IL)
Total Population (2000): 4800
Total Housing Units (2000): 2494
Land Area (square meters): 461881212
Water Area (square meters): 8287483
Land Area (square miles): 178.333341
Water Area (square miles): 3.199815
Latitude (decimal degrees): 37.470687
Longitude (decimal degrees): -88.281762
FIPS Code: 17
Place FIPS Code: 69