Classification: County
Located in: Illinois (IL)
Total Population (2000): 5376741
Total Housing Units (2000): 2096121
Land Area (square meters): 2449300798
Water Area (square meters): 1785436307
Land Area (square miles): 945.680365
Water Area (square miles): 689.360841
Latitude (decimal degrees): 41.837649
Longitude (decimal degrees): -87.767817
FIPS Code: 17
Place FIPS Code: 31