Classification: County
Located in: Iowa (IA)
Total Population (2000): 38052
Total Housing Units (2000): 16612
Land Area (square meters): 1340040200
Water Area (square meters): 55355227
Land Area (square miles): 517.392436
Water Area (square miles): 21.372774
Latitude (decimal degrees): 40.576831
Longitude (decimal degrees): -91.416607
FIPS Code: 19
Place FIPS Code: 111