Total population (1990 census):
County seat:
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 522 | 93504 | 10880772 bu | |
| Wheat for Grain, Total | 3 | 120 | 1420 bu | |
| Oats | 91 | 1855 | 118338 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 509 | 86225 | 3411149 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 391 | 15548 | 35890 tons, dry | |
| Alfalfa Hay | 317 | 11109 | 28657 tons, dry | |
| Small Grain Hay | 55 | 963 | 1421 tons, dry | |
| Tame Hay | 102 | 2834 | 4847 tons, dry | |
| Wild Hay | 9 | 373 | 425 tons dry | |
| Grass Silage | 10 | 269 | 1621 tons, grn | |
| Corn for Silage | 48 | 951 | 12694 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Sweet Corn | 4 | 7 | ||
| Fruits | Farms | Acres | Yield | |
| Apples | 3 | 11 | D | |
| 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 | 4 | D | D | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.