Total population (1990 census): 757027
County seat: Rockville
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 | 58 | 12097 | 927217 bu | |
| Wheat | 46 | 5279 | 366734 bu | |
| Barley | 11 | 614 | 43424 bu | |
| Oats | 7 | 104 | 7780 bu | |
| Rye | 3 | 70 | 2670 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybeans for Beans | 58 | 16047 | 394279 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 223 | 12060 | 21814 tons, dry | |
| Alfalfa Hay | 36 | 1171 | 2692 tons, dry | |
| Small Grain Hay | 8 | 438 | 1232 tons, dry | |
| Tame Hay | 192 | 9732 | 16875 tons, dry | |
| Wild Hay | 20 | 280 | 412 tons dry | |
| Grass Silage | 15 | 439 | 1804 tons, grn | |
| Corn for Silage | 21 | 2425 | 22540 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Asparagus | 3 | D | ||
| Snap Beans | 5 | 6 | ||
| Broccoli | 6 | 4 | ||
| Head Cabbage | 4 | 1 | ||
| Cantaloupes | 6 | 13 | ||
| Cucumbers and Pickles | 4 | 7 | ||
| Eggplant | 3 | D | ||
| Mustard Greens | 3 | 11 | ||
| Sweet Peppers | 6 | 10 | ||
| Potatoes | 3 | 9 | D | |
| Pumpkins | 14 | 429 | ||
| Squash | 10 | 11 | ||
| Sweet Corn | 20 | 285 | ||
| Tomatoes | 11 | 30 | ||
| Mixed Vegetables | 4 | 3 | ||
| Fruits and Nuts | Farms | Acres | Yield | |
| Apples | 14 | 45 | 8503 trees | |
| Cherries, Total | 4 | 6 | 641 trees | |
| Tart Cherries | 3 | D | D trees | |
| Grapes | 3 | 2 | 720 vines | |
| Peaches | 13 | 85 | 9015 trees | |
| Pears | 4 | 3 | 229 trees | |
| Blackberries | 11 | 14 | 28539 lbs | |
| Tame Blueberries | 4 | D | 14220 lbs | |
| Raspberries | 9 | 8 | 7877 lbs | |
| Strawberries | 9 | 42 | 154650 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 | 95 | 705105 | 1406 | 10957 |
| Nursery, Floriculture Vegetable and Flower Seed Crops | 42 | X | 517 | X |
| Floriculture Crops | 34 | 685800 | 80 | 5978 |
| Bedding and Garden Plants | 24 | 507600 | 75 | 4935 |
| Cut Flowers and Cut Florist Greens | 8 | D | 5 | 63 |
| Potted Flowering Plants | 7 | D | 1 | D |
| Cut Christmas Trees Harvested | 23 | X | 100 | 277 |
| Nursery Crops | 35 | D | 632 | 3179 |
| Sod Harvested | 4 | X | 392 | 1278 |
| Greenhouse Vegetables | 4 | 9525 | X | 166 |
| Other Nursery and Greenhouse Crops | 22 | D | D | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.