Classification: County
Located in: Iowa (IA)
Total Population (2000): 20336
Total Housing Units (2000): 8246
Land Area (square meters): 1125187417
Water Area (square meters): 5797310
Land Area (square miles): 434.437309
Water Area (square miles): 2.238354
Latitude (decimal degrees): 40.982369
Longitude (decimal degrees): -91.542799
FIPS Code: 19
Place FIPS Code: 87