Total population (1990 census): 49183
County seat:
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 642 | 87103 | 11982090 bu | |
| Wheat for Grain, Total | 56 | 1287 | 49399 bu | |
| Spring Wheat for Grain | 53 | 1235 | 47779 bu | |
| Winter Wheat for Grain | 5 | 52 | 1620 bu | |
| Barley | 21 | 254 | 11601 bu | |
| Oats | 169 | 2973 | 191792 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 559 | 70210 | 2924637 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 564 | 20037 | 55570 tons, dry | |
| Alfalfa Hay | 469 | 13479 | 43478 tons, dry | |
| Small Grain Hay | 45 | 756 | 1292 tons, dry | |
| Tame Hay | 93 | 1659 | 3555 tons, dry | |
| Wild Hay | 79 | 991 | 1816 tons dry | |
| Grass Silage | 62 | 3152 | 16290 tons, grn | |
| Corn for Silage | 173 | 5360 | 94577 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Snap Bean | 3 | D | ||
| Cantaloupes | 3 | 1 | ||
| Green Peas | 13 | 566 | ||
| Potatoes | 4 | D | D | |
| Pumpkins | 6 | 9 | ||
| Squash | 4 | 5 | ||
| Sweet Corn | 17 | 288 | ||
| Other Vegetables | 3 | D | ||
| Fruits | Farms | Acres | Yield | |
| Apples | 12 | 161 | 20503 trees | |
| Raspberries | 4 | D | 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 | 18 | D | 195 | 2614 |
| Nursery, Floriculture, Vegetable and Flower Seed Crops | 3 | X | D | X |
| Florculture Crops | 8 | D | D | D |
| Bedding/Garden Plants | 4 | D | D | 640 |
| Potted Flowering Plants | 3 | D | D | D |
| Cut Christmas Trees Harvested | 3 | X | 21 | D |
| Nursery Crops | 8 | D | 126 | 633 |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.