Classification: County
Located in: Illinois (IL)
Total Population (2000): 59612
Total Housing Units (2000): 26844
Land Area (square meters): 1523235581
Water Area (square meters): 37301738
Land Area (square miles): 588.124571
Water Area (square miles): 14.402282
Latitude (decimal degrees): 37.769401
Longitude (decimal degrees): -89.314721
FIPS Code: 17
Place FIPS Code: 77