Classification: County
Located in: Illinois (IL)
Total Population (2000): 16798
Total Housing Units (2000): 7282
Land Area (square meters): 1029716440
Water Area (square meters): 19628562
Land Area (square miles): 397.575757
Water Area (square miles): 7.57863
Latitude (decimal degrees): 40.178001
Longitude (decimal degrees): -88.914787
FIPS Code: 17
Place FIPS Code: 39