Total population (1990 census): 728553
County seat: Upper Marlboro
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 | 81 | 4427 | 344363 bu | |
| Wheat | 32 | 1671 | 92889 bu | |
| Oats | 6 | 89 | 4015 bu | |
| Rye | 8 | 95 | 2137 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybeans for Beans | 97 | 5731 | 145028 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 147 | 4544 | 7487 tons, dry | |
| Alfalfa Hay | 21 | 303 | 846 tons, dry | |
| Small Grain Hay | 9 | 130 | D | |
| Tame Hay | 117 | 3557 | 5757 tons, dry | |
| Wild Hay | 15 | 354 | 385 tons dry | |
| Grass Silage | 4 | 200 | D | |
| Corn for Silage | 8 | 329 | 3696 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Snap Beans | 13 | 29 | ||
| Broccoli | 3 | 5 | ||
| Head Cabbage | 6 | 12 | ||
| Cantaloupes | 11 | 9 | ||
| Collards | 11 | D | ||
| Cucumbers and Pickles | 15 | D | ||
| Eggplant | 8 | 2 | ||
| Kale | 18 | D | ||
| Lettuce and Romaine | 3 | 1 | ||
| Mustard Greens | 7 | 3 | ||
| Green Onions | 3 | 4 | ||
| Okra | 11 | 13 | ||
| Parsley | 4 | 1 | ||
| Hot Peppers | 7 | 3 | ||
| Sweet Peppers | 20 | 20 | ||
| Potatoes | 8 | 11 | 875 cwt | |
| Sweetpotatoes | 5 | 7 | 686 bu | |
| Pumpkins | 13 | 63 | ||
| Squash | 22 | D | ||
| Sweet Corn | 39 | 147 | ||
| Tomatoes | 32 | 46 | ||
| Turnips | 9 | 11 | ||
| Watermelons | 15 | 20 | ||
| Other Vegetables | 5 | 22 | ||
| Fruits and Nuts | Farms | Acres | Yield | |
| Apples | 15 | 41 | 4826 trees | |
| Peaches | 7 | 33 | 4318 trees | |
| Pears | 4 | D | D | |
| Blackberries | 6 | 3 | 7000 lbs | |
| Tame Blueberries | 5 | 8 | 3910 lbs | |
| Strawberries | 10 | 43 | 159000 lbs | |
| Other Crops | Farms | Acres | Yield | |
| Tobacco | 94 | 791 | 1091872 bu | |
| 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 | 60 | 709080 | 859 | 8679 |
| Nursery, Floriculture Vegetable and Flower Seed Crops | 24 | X | 130 | X |
| Floriculture Crops | 29 | 631620 | 49 | 4995 |
| Bedding and Garden Plants | 18 | 524720 | 22 | 4433 |
| Cut Flowers and Cut Florist Greens | 8 | D | 10 | D |
| Potted Flowering Plants | 12 | 80500 | 17 | 448 |
| Cut Christmas Trees Harvested | 11 | X | 49 | 50 |
| Nursery Crops | 25 | D | 202 | 2871 |
| Greenhouse Vegetables | 3 | D | X | D |
| Other Nursery and Greenhouse Crops | 5 | 9860 | D | 96 |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.