Total population (1990 census): 13743
County seat: Centerville
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 309 | 27217 | 3290397 bu | |
| Wheat for Grain, Total | 7 | 174 | 7270 bu | |
| Oats | 33 | 586 | 34128 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 316 | 30320 | 1240536 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 547 | 42032 | 94117 tons, dry | |
| Alfalfa Hay | 359 | 20755 | 54400 tons, dry | |
| Small Grain Hay | 42 | 1197 | 2421 tons, dry | |
| Tame Hay | 282 | 18928 | 36062 tons, dry | |
| Wild Hay | 15 | 381 | 476 tons dry | |
| Grass Silage | 12 | 771 | 2275 tons, grn | |
| Corn for Silage | 29 | 754 | 10057 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Sweet Corn | 3 | 4 | ||
| Fruits | Farms | Acres | Yield | |
| Other Fruits and Nuts | 3 | 24 | 1580 | |
*Alfalfa, grass silage, green chops etc.