Classification: County
Located in: Illinois (IL)
Total Population (2000): 7189
Total Housing Units (2000): 3304
Land Area (square meters): 1132637582
Water Area (square meters): 10545936
Land Area (square miles): 437.313834
Water Area (square miles): 4.071809
Latitude (decimal degrees): 40.143586
Longitude (decimal degrees): -90.5791
FIPS Code: 17
Place FIPS Code: 169