Total population (1990 census): 10446
County seat: Seneca
CropSELECT
Cereals, Pseudocereals, Oilseeds
Industrial, Fiber
Forages
Vegetables
Small Fruits
Tree Fruits and Nuts
Herb, Aromatic, Medicinal, and Bioactive
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 400 | 29800 | 2952358 bu | |
| Sorghum for Grain or Seed | 520 | 71723 | 6379836 bu | |
| Wheat for Grain, Total | 435 | 30434 | 1295936 bu | |
| Barley | 4 | 268 | 16150 bu | |
| Oats | 80 | 1544 | 100835 bu | |
| Sunflower Seed | 17 | 768 | 648632 lbs | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 575 | 57569 | 2054415 bu | |
| Forages | Farms | Acres | Yield | |
| Field Seed and Grass Seed Crops | 15 | 427 | X | |
| Red Clover Seed | 12 | 215 | 21792 lbs | |
| Total Hay* | 584 | 35817 | 78507 tons, dry | |
| Alfalfa Hay | 301 | 8396 | 26310 tons, dry | |
| Small Grain Hay | 28 | 619 | 1235 tons, dry | |
| Tame Hay | 443 | 21535 | 42591 tons, dry | |
| Wild Hay | 100 | 3951 | 5671 tons dry | |
| Grass Silage | 45 | 1316 | 8101 tons, grn | |
| Corn for Silage | 106 | 4164 | 60237 tons, grn | |
| Sorghum for Silage | 72 | 1717 | 25198 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 | 4 | D | D | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.