Total population (1990 census): 19252
County seat: Yankton
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 | 405 | 68905 | 6225630 bu | |
| Wheat for Grain, Total | 19 | 828 | 27585 bu | |
| Other Spring Wheat | 3 | D | D | |
| Winter Wheat | 16 | 651 | 23195 bu | |
| Oats | 62 | 1897 | 121685 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybeans for Beans | 427 | 81056 | 2700033 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 367 | 25945 | 67211 tons, dry | |
| Alfalfa Hay | 314 | 19029 | 56610 tons, dry | |
| Small Grain Hay | 30 | 670 | 987 tons, dry | |
| Tame Hay | 82 | 2909 | 4254 tons, dry | |
| Wild Hay | 89 | 3158 | 5005 tons dry | |
| Grass Silage | 8 | 179 | 1061 tons, grn | |
| Corn for Silage | 107 | 5257 | 52687 tons, grn | |
| Sorghum for Silage | 15 | 303 | 3788 tons, grn | |
| Fruits | Farms | Acres | Yield | |
| Apples | 5 | 44 | 3897 trees | |
| Cherries, Total | 4 | 2 | 135 trees | |
| Tart Cherries | 4 | 2 | 135 trees | |
| Pears | 3 | D | D | |
| Plums and Prunes | 4 | D | 303 trees | |
| Blackberries | 2 | D | D | |
| Raspberries | 3 | 6 | 4635 lbs | |
| Strawberries | 3 | 6 | 9850 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 | 5 | D | 127 | D |
| Nursery, Floriculture, Vegetable and Flower Seed Crops | 3 | X | D | X |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.