Total population (1990 census):
County seat:
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 479 | 113348 | 15864385 bu | |
| Wheat for Grain, Total | 14 | 412 | 15347 bu | |
| Spring Wheat for Grain | 13 | D | D | |
| Oats | 40 | 654 | 40075 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 481 | 113938 | 4747401 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 98 | 2085 | 5432 tons, dry | |
| Alfalfa Hay | 72 | 1020 | 3288 tons, dry | |
| Small Grain Hay | 8 | 193 | 435 tons, dry | |
| Tame Hay | 9 | 100 | 255 tons, dry | |
| Wild Hay | 31 | 452 | 872 tons dry | |
| Grass Silage | 9 | 320 | 1747 tons, grn | |
| Corn for Silage | 36 | 1011 | 17107 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Green Peas | 26 | 861 | ||
| Sweet Corn | 10 | 324 | ||
| 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 | 6 | D | D | D |
| Florculture Crops | 3 | 3760 | D | 15 |
| Bedding/Garden Plants | 3 | D | D | D |
| Nursery Crops | 3 | D | 32 | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.