Classification: County
Located in: Illinois (IL)
Total Population (2000): 21802
Total Housing Units (2000): 9053
Land Area (square meters): 1855693082
Water Area (square meters): 22975523
Land Area (square miles): 716.487135
Water Area (square miles): 8.870899
Latitude (decimal degrees): 39.000305
Longitude (decimal degrees): -88.990889
FIPS Code: 17
Place FIPS Code: 51