Classification: County
Located in: Iowa (IA)
Total Population (2000): 42351
Total Housing Units (2000): 18643
Land Area (square meters): 1077819498
Water Area (square meters): 35352273
Land Area (square miles): 416.148452
Water Area (square miles): 13.649589
Latitude (decimal degrees): 40.854437
Longitude (decimal degrees): -91.156013
FIPS Code: 19
Place FIPS Code: 57