Total population (1990 census): 112560
County seat: Prosser
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 | 11 | D | D | |
| Wheat for Grain, Total | 81 | 130981 | 5243820 bu | |
| Spring Wheat | 33 | 20123 | 846270 bu | |
| Winter Wheat | 72 | 110858 | 4397550 bu | |
| Barley | 4 | 435 | D | |
| Canola | 3 | D | D | |
| Forages | Farms | Acres | Yield | |
| Field Seed and Grass Seed Crops | 9 | D | X | |
| Kentucky Bluegrass Seed | 8 | 6742 | 5829013 lbs | |
| Total Hay* | 256 | 18737 | 96064 tons, dry | |
| Alfalfa Hay | 197 | 13241 | 86460 tons, dry | |
| Small Grain Hay | 16 | 733 | 1843 tons, dry | |
| Tame Hay | 43 | D | 6819 tons, dry | |
| Wild Hay | 17 | 285 | 488 tons dry | |
| Grass Silage | 8 | D | 1363 tons, grn | |
| Corn for Silage | 6 | 357 | 12868 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Asparagus | 17 | 1638 | ||
| Sugar Beets for Sugar | 5 | 4284 | 153764 tons | |
| Cantaloups | 3 | D | ||
| Cucumbers and Pickles | 3 | D | ||
| Dry Onions | 8 | 3398 | ||
| Green Peas | 4 | D | ||
| Sweet Peppers | 3 | 2 | ||
| Potatoes | 16 | 25317 | 15378759 cwt | |
| Pumpkins | 5 | D | ||
| Squash | 3 | D | ||
| Sweet Corn | 15 | 15729 | ||
| Tomatoes | 4 | 3 | ||
| Fruits and Nuts | Farms | Acres | Yield | |
| Apples | 218 | 18425 | 4927291 trees | |
| Apricots | 21 | 174 | 24035 trees | |
| Cherries, Total | 147 | 3219 | 388207 trees | |
| Sweet Cherries | 147 | D | D | |
| Tart Cherries | 6 | D | D | |
| Grapes | 164 | 15929 | 10217237 vines | |
| Nectarines | 19 | 106 | 19114 trees | |
| Peaches | 25 | 149 | 26819 trees | |
| Pears | 29 | 472 | 88390 trees | |
| Plums and Prunes | 16 | 180 | 30435 trees | |
| English Walnuts | 9 | 41 | 3429 in shell | |
| Other Fruits and Nuts | 3 | D | 720 trees | |
| Currants | 3 | D | D | |
| Raspberries | 3 | Z | D | |
| Other Crops | Farms | Acres | Yield | |
| Hops | 8 | 4412 | 7090217 lbs | |
| Mint for Oil | 8 | D | 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 | 26 | 29588 | 218 | 1609 |
| Nursery, Floriculture Vegetable and Flower Seed Crops | 24 | X | 216 | X |
| Floriculture Crops | 6 | D | 18 | D |
| Bedding/Garden Plants | 4 | D | D | D |
| Cut Flowers and Cut Florist Greens | 3 | D | D | D |
| Nursery Crops | 16 | D | 161 | 1056 |
*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.