Total population (1990 census): 12076
County seat: Red Oak
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 401 | 80630 | 10422485 bu | |
| Wheat for Grain, Total | 3 | D | D | |
| Oats | 25 | 590 | 39752 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 397 | 79948 | 3481395 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 291 | 11540 | 29678 tons, dry | |
| Alfalfa Hay | 251 | 8377 | 23993 tons, dry | |
| Small Grain Hay | 50 | 803 | 1537 tons, dry | |
| Tame Hay | 70 | 2036 | 3805 tons, dry | |
| Wild Hay | 4 | 89 | 76 tons dry | |
| Grass Silage | 9 | 235 | 801 tons, grn | |
| Corn for Silage | 27 | 746 | 11538 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 | 7 | D | 18 | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.