Total population (1990 census): 11952
County seat: Rock Rapids
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 850 | 141720 | 18010906 bu | |
| Wheat for Grain, Total | 11 | 336 | 10980 bu | |
| Oats | 127 | 2443 | 188765 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 837 | 134236 | 6032759 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 457 | 11619 | 34013 tons, dry | |
| Alfalfa Hay | 314 | 6489 | 22979 tons, dry | |
| Small Grain Hay | 31 | 524 | 1065 tons, dry | |
| Tame Hay | 107 | 1942 | 4165 tons, dry | |
| Wild Hay | 93 | 1349 | 2456 tons dry | |
| Grass Silage | 45 | 1315 | 10043 tons, grn | |
| Corn for Silage | 216 | 7138 | 125483 tons, grn | |
| Nursery and Greenhouse Crops, Cut Christmas Trees Harvested, Mushrooms, and Sod Grown for Sale | Farms | Sq. ft. under glass or other protection | Acres in the open | Sales ($1,000) |
| Nursery and Greenhouse Crops | 3 | 34008 | D | 217 |
| Florculture Crops | 3 | D | D | D |
| Bedding/Garden Plants | 3 | D | D | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.