Total population (1990 census): 16805
County seat: Mt. Carroll
CropSELECT
FruitsCrop Statistics(1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 436 | 132961 | 18289385 bu | |
| Wheat | 21 | 632 | 28732 bu | |
| Barley | 3 | (D) | (D) | |
| Oats | 97 | 2244 | 141735 bu | |
| Popcorn | 4 | 755 | 2026077 lbs, shelled | |
| Rye | 4 | 50 | 2135 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 291 | 12973 | 44973 tons, dry | |
| Alfalfa Hay | 265 | 9679 | 36545 tons, dry | |
| Small Grain Hay | 31 | 496 | 920 tons, dry | |
| Tame Hay | 25 | 329 | 698 tons, dry | |
| Wild Hay | 6 | 65 | 126 tons dry | |
| Grass Silage | 48 | 2404 | 20053 tons, grn | |
| Corn for Silage | 110 | 4274 | 76879 tons, grn | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 293 | 39109 | 2027762 bu | |
| Vegetables | Farms | Acres | Yield | |
| Asparagus | 3 | (D) | ||
| Cantaloupes | 3 | (D) | ||
| Pumpkins | 3 | (D) | ||
| Sweet Corn | 4 | (D) | ||
| Watermelons | 3 | (D) | ||
| Fruits | Farms | Acres | Yield | |
| Apples | 6 | 7 | 725 trees | |
| 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 | 10 | (D) | 126 | 236 |
| Cut Christmas Trees Harvested | 6 | (X) | 35 | 61 |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.