Total population (1990 census): 91607
County seat: Belvidere
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 | 180 | 21281 | 2463248 bu | |
| Wheat | 37 | 1236 | 66491 bu | |
| Oats | 30 | 414 | 22700 bu | |
| Rye | 6 | 44 | 1020 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybeans for Beans | 37 | 2885 | 112891 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 355 | 15472 | 32344 tons, dry | |
| Alfalfa Hay | 138 | 4949 | 14704 tons, dry | |
| Small Grain Hay | 21 | 582 | 699 tons, dry | |
| Tame Hay | 219 | 7551 | 13219 tons, dry | |
| Wild Hay | 47 | 699 | 711 tons dry | |
| Grass Silage | 43 | 1691 | 9036 tons, grn | |
| Corn for Silage | 102 | 3855 | 59858 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Asparagus | 9 | 7 | ||
| Snap Beans | 16 | 31 | ||
| Beets | 10 | 26 | ||
| Broccoli | 11 | 10 | ||
| Brussels Sprouts | 3 | 1 | ||
| Chinese Cabbage | 4 | 1 | ||
| Head Cabbage | 14 | D | ||
| Cantaloupes | 6 | 4 | ||
| Carrots | 4 | 2 | ||
| Cauliflower | 7 | 3 | ||
| Collards | 4 | D | ||
| Cucumbers and Pickles | 17 | 10 | ||
| Eggplant | 11 | 15 | ||
| Endive | 7 | D | ||
| Escarole | 3 | D | ||
| Garlic | 5 | 1 | ||
| Herbs, Fresh Cut | 7 | 44 | ||
| Kale | 8 | D | ||
| Lettuce and Romaine | 15 | D | ||
| Mustard Greens | 4 | D | ||
| Dry Onions | 9 | 3 | ||
| Green Onions | 4 | 1 | ||
| Parsley | 4 | D | ||
| Green Peas | 6 | 3 | ||
| Hot Peppers | 5 | 1 | ||
| Sweet Peppers | 20 | 22 | ||
| Potatoes | 7 | 10 | 1155 cwt | |
| Pumpkins | 39 | 202 | ||
| Spinach | 5 | D | ||
| Squash | 25 | 61 | ||
| Sweet Corn | 44 | 576 | ||
| Tomatoes | 43 | 65 | ||
| Mixed Vegetables | 9 | 33 | ||
| Watermelons | 4 | D | ||
| Other Vegetables | 9 | 37 | ||
| Fruits and Nuts | Farms | Acres | Yield | |
| Apples | 56 | 267 | 20040 trees | |
| Apricots | 3 | 1 | D | |
| Cherries, Total | 13 | 4 | 206 trees | |
| Sweet Cherries | 11 | 3 | 149 trees | |
| Tart Cherries | 7 | 1 | 57 trees | |
| Grapes | 23 | 81 | 42102 vines | |
| Peaches | 32 | 107 | 9203 trees | |
| Pears | 13 | 11 | 370 trees | |
| Plums and Prunes | 10 | 6 | 154 | |
| Other Fruits and Nuts | 6 | 2 | 48 | |
| Tame Blueberries | 6 | 19 | 8000 lbs | |
| Raspberries | 27 | 25 | 27266 lbs | |
| Strawberries | 13 | 20 | 67781 lbs | |
| Other Crops | Farms | Acres | Yield | |
| Maple Trees Tapped | 1 | 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 | 163 | 898184 | 1267 | 6546 |
| Nursery, Floriculture Vegetable and Flower Seed Crops | 29 | X | 428 | X |
| Floriculture Crops | 39 | 862096 | D | 3155 |
| Bedding and Garden Plants | 27 | 757652 | 17 | 2628 |
| Cut Flowers and Cut Florist Greens | 8 | D | D | D |
| Potted Flowering Plants | 14 | 96444 | 7 | 499 |
| Bulbs, Corms, Rhizomes, and Tubers | 3 | D | D | D |
| Cut Christmas Trees Harvested | 96 | X | 592 | 1632 |
| Nursery Crops | 24 | 6688 | 92 | 203 |
| Sod Harvested | 5 | X | 275 | 1383 |
| Greenhouse Vegetables | 3 | D | X | D |
| Other Nursery and Greenhouse Crops | 43 | D | 276 | 48 |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.