Classification: County
Located in: Illinois (IL)
Total Population (2000): 188951
Total Housing Units (2000): 85459
Land Area (square meters): 2248581464
Water Area (square meters): 22855343
Land Area (square miles): 868.182194
Water Area (square miles): 8.824498
Latitude (decimal degrees): 39.763854
Longitude (decimal degrees): -89.646499
FIPS Code: 17
Place FIPS Code: 167