Classification: County
Located in: Illinois (IL)
Total Population (2000): 26733
Total Housing Units (2000): 12360
Land Area (square meters): 992766969
Water Area (square meters): 9496536
Land Area (square miles): 383.309486
Water Area (square miles): 3.666633
Latitude (decimal degrees): 37.753831
Longitude (decimal degrees): -88.54084
FIPS Code: 17
Place FIPS Code: 165