Total population (1990 census): 10034
County seat: Onawa
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 515 | 140004 | 16747695 bu | |
| Wheat for Grain, Total | 7 | 457 | 12282 bu | |
| Oats | 38 | 1001 | 70362 bu | |
| Popcorn | 19 | 3263 | 7248976 lbs, shelled | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 486 | 123734 | 5018939 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 219 | 8812 | 25170 tons, dry | |
| Alfalfa Hay | 190 | 6891 | 21974 tons, dry | |
| Small Grain Hay | 48 | 890 | 1774 tons, dry | |
| Tame Hay | 30 | 817 | 1208 tons, dry | |
| Wild Hay | 4 | 29 | 41 tons dry | |
| Grass Silage | 11 | 185 | 521 tons, grn | |
| Corn for Silage | 63 | 2045 | 28577 tons, grn | |
| Fruits | Farms | Acres | Yield | |
| Apples | 3 | D | D | |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.