Total population (1990 census): 16275
County seat: Colusa
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 | 28 | 5058 | 832264 bu | |
| Sorghum for Grain or Seed | 4 | 108 | 6463 bu | |
| Wheat for Grain, Total | 137 | 37879 | 2973764 bu | |
| Barley | 3 | 310 | 12250 bu | |
| Rice | 405 | 129974 | 10324528 cwt | |
| Safflower | 61 | 11084 | 25089366 lbs | |
| Sunflower Seed | 14 | 1188 | 1251824 lbs | |
| Grain Legumes | Farms | Acres | Yield | |
| Dry Edible Beans | 19 | 7483 | 16855 cwt | |
| Dry Lima Beans | 28 | 4460 | 107117 cwt | |
| Dry Cowpeas and Dry Southern Peas | 16 | 2098 | 61984 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 72 | 10400 | 49391 tons, dry | |
| Alfalfa Hay | 43 | 7627 | 42168 tons, dry | |
| Small Grain Hay | 21 | 1129 | 2734 tons, dry | |
| Tame Hay | 12 | 1409 | 4158 tons, dry | |
| Wild Hay | 7 | 235 | 331 tons dry | |
| Corn for Silage | 5 | 473 | D | |
| Vegetables | Farms | Acres | Yield | |
| Sugar Beets for Sugar | 16 | 2098 | 61984 tons | |
| Cantaloupes | 6 | 119 | ||
| Cucumbers & Pickles | 18 | 1952 | ||
| Honeydew Melons | 3 | D | ||
| Pumpkins | 3 | 52 | ||
| Squash | 14 | 516 | ||
| Sweet Corn | 4 | 252 | ||
| Tomatoes | 40 | 24308 | ||
| Watermelons | 14 | 533 | ||
| Fruits and Nuts | Farms | Acres | Yield | |
| Apples | 8 | 19 | 1656 trees | |
| Apricots | 4 | D | 1162 trees | |
| Grapes | 5 | 1421 | 735527 vines | |
| Olives | 5 | 127 | 7617 trees | |
| Pears | 3 | 15 | 2608 trees | |
| Plums and Prunes | 36 | 4982 | 565815 trees | |
| Almonds | 153 | 22033 | 1977314 | |
| Pecans | 6 | 61 | 2566 in shell | |
| English Walnuts | 122 | 4242 | 158168 in shell | |
| Other Crops | Farms | Acres | Yield | |
| Cotton | 19 | 7483 | 16855 bales | |
| Other | 5 | 668 | X | |
| 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 | 25 | D | 10353 | 17024 |
| Nursery, Floriculture Vegetable and Flower Seed Crops | 23 | X | 10351 | X |
| Vegetable and Flower Seeds | 22 | D | D | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.