Classification: County
Located in: Illinois (IL)
Total Population (2000): 32913
Total Housing Units (2000): 13289
Land Area (square meters): 1526202798
Water Area (square meters): 1943173
Land Area (square miles): 589.27022
Water Area (square miles): 0.750263
Latitude (decimal degrees): 40.472379
Longitude (decimal degrees): -90.670355
FIPS Code: 17
Place FIPS Code: 109