Total population (1990 census): 81343
County seat: Rapid City
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 | 9 | 2167 | 195547 bu | |
| Sorghum for Grain or Seed | 6 | 1285 | 67581 bu | |
| Wheat for Grain, Total | 128 | 78639 | 1952569 bu | |
| Other Spring Wheat | 68 | D | D | |
| Winter Wheat | 108 | 55164 | 1329880 bu | |
| Barley | 11 | 463 | 9888 bu | |
| Oats | 28 | 1952 | 85378 bu | |
| Proso Millet | 10 | 1988 | 80990 bu | |
| Safflower | 22 | 7583 | 3863460 lbs | |
| Sunflower Seed | 4 | 759 | 545800 lbs | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybeans for Beans | 4 | 493 | 12558 bu | |
| Forages | Farms | Acres | Yield | |
| Field Seed and Grass Seed Crops | 7 | D | X | |
| Alfalfa Seed | 5 | 655 | 29800 lbs | |
| Total Hay* | 414 | 77747 | 109761 tons, dry | |
| Alfalfa Hay | 342 | 54599 | 85131 tons, dry | |
| Small Grain Hay | 37 | D | D | |
| Tame Hay | 97 | 7261 | 8754 tons, dry | |
| Wild Hay | 147 | 12177 | 11720 tons dry | |
| Corn for Silage | 10 | 665 | 4722 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Lettuce and Romaine | 1 | D | ||
| 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 | 11 | 112120 | 167 | 2070 |
| Nursery, Floriculture, Vegetable and Flower Seed Crops | 6 | X | 139 | X |
| Florculture Crops | 5 | D | D | D |
| Bedding/Garden Plants | 5 | 84820 | D | 1043 |
| Nursery Crops | 4 | D | D | 79 |
| Sod Harvested | 4 | X | 161 | 432 |
| Other Nursery and Greenhouse Crops | 3 | D | D | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.