Total population (1990 census): 22429
County seat: Vinton
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 866 | 166702 | 23422374 bu | |
| Wheat for Grain, Total | 4 | 245 | 9468 bu | |
| Barley | 3 | 23 | 1320 bu | |
| Oats | 200 | 3635 | 275276 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 813 | 155595 | 7662847 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 531 | 16617 | 50271 tons, dry | |
| Alfalfa Hay | 493 | 13106 | 43886 tons, dry | |
| Small Grain Hay | 60 | 909 | 1591 tons, dry | |
| Tame Hay | 56 | 1123 | 2080 tons, dry | |
| Wild Hay | 11 | 458 | 817 tons dry | |
| Grass Silage | 27 | 1021 | 5691 tons, grn | |
| Corn for Silage | 86 | 1974 | 32333 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Snap Bean | 3 | 2 | ||
| Head Cabbage | 3 | D | ||
| Cucumbers & Pickles | 3 | D | ||
| Sweet Corn | 10 | 20 | ||
| Tomatoes | 5 | 5 | ||
| Fruits | Farms | Acres | Yield | |
| Apples | 3 | Z | 17 trees | |
| Other Fruits and Nuts | 3 | 10 | D | |
| Strawberries | 3 | 1 | 2500 lbs | |
| 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 | 17 | 24440 | 158 | 364 |
| Florculture Crops | 6 | 24440 | D | 122 |
| Bedding/Garden Plants | 6 | 15640 | D | 76 |
| Potted Flowering Plants | 3 | D | D | D |
| Cut Christmas Trees Harvested | 4 | X | 1 | 10 |
| Nursery Crops | 8 | D | 41 | 170 |
| Other Nursery and Greenhouse Crops | 5 | D | 89 | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.
Z=Less than half of the unit shown.