Classification: County
Located in: Illinois (IL)
Total Population (2000): 15148
Total Housing Units (2000): 6385
Land Area (square meters): 1457147214
Water Area (square meters): 3912917
Land Area (square miles): 562.607709
Water Area (square miles): 1.510786
Latitude (decimal degrees): 38.366222
Longitude (decimal degrees): -89.376927
FIPS Code: 17
Place FIPS Code: 189