Total population (1990 census): 11508
County seat: Rockwell City
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 650 | 149875 | 19749654 bu | |
| Oats | 64 | 885 | 73896 bu | |
| Popcorn | 3 | 395 | 1378000 lbs, shelled | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 668 | 153275 | 6719423 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 172 | 3051 | 6843 tons, dry | |
| Alfalfa Hay | 141 | 2218 | 5528 tons, dry | |
| Small Grain Hay | 20 | 209 | 381 tons, dry | |
| Tame Hay | 36 | 422 | 550 tons, dry | |
| Wild Hay | 3 | 31 | D | |
| Grass Silage | 9 | 171 | D | |
| Corn for Silage | 39 | 2012 | 25960 tons, grn | |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.