Total population (1990 census): 21423
County seat: Carroll
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 883 | 151595 | 19662164 bu | |
| Wheat for Grain, Total | 3 | 114 | 5160 bu | |
| Oats | 150 | 2324 | 186174 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 863 | 138727 | 6236473 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 390 | 9929 | 29525 tons, dry | |
| Alfalfa Hay | 352 | 7965 | 26127 tons, dry | |
| Small Grain Hay | 44 | 694 | 1281 tons, dry | |
| Tame Hay | 50 | 802 | 1438 tons, dry | |
| Wild Hay | 7 | 155 | 125 tons dry | |
| Grass Silage | 16 | 313 | 1664 tons, grn | |
| Corn for Silage | 77 | 2631 | 39336 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Sweet Corn | 5 | 11 | ||
| Fruits | Farms | Acres | Yield | |
| Apples | 5 | 8 | 152 trees | |
| Peaches | 3 | 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 | 5 | D | 8 | D |
| Cut Christmas Trees Harvested | 3 | X | 8 | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.