Classification: County
Located in: Illinois (IL)
Total Population (2000): 256082
Total Housing Units (2000): 104446
Land Area (square meters): 1719253745
Water Area (square meters): 26278018
Land Area (square miles): 663.80761
Water Area (square miles): 10.146
Latitude (decimal degrees): 38.532682
Longitude (decimal degrees): -90.002067
FIPS Code: 17
Place FIPS Code: 163