Total population (1990 census): 29755
County seat: Adel
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 553 | 126098 | 16867647 bu | |
| Wheat for Grain, Total | 5 | 158 | 4640 bu | |
| Oats | 40 | 886 | 65141 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 581 | 126449 | 5296309 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 330 | 9022 | 25600 tons, dry | |
| Alfalfa Hay | 288 | 7152 | 22233 tons, dry | |
| Small Grain Hay | 24 | 381 | 791 tons, dry | |
| Tame Hay | 60 | 1216 | 2138 tons, dry | |
| Wild Hay | 6 | 129 | 102 tons dry | |
| Grass Silage | 10 | 144 | 1006 tons, grn | |
| Corn for Silage | 34 | 819 | 13641 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Pumpkins | 5 | D | ||
| Sweet Corn | 9 | 161 | ||
| Tomatoes | 5 | 9 | ||
| Fruits | Farms | Acres | Yield | |
| Apples | 11 | 33 | 2951 trees | |
| Peaches | 5 | 1 | 28 trees | |
| Plums and Prunes | 4 | Z | 36 trees | |
| Other Fruits and Nuts | 4 | D | D | |
| Strawberries | 3 | 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 | 20 | 90072 | 1700 | 3385 |
| Nursery, Floriculture, Vegetable and Flower Seed Crops | 7 | X | D | X |
| Florculture Crops | 5 | 90072 | D | 660 |
| Bedding/Garden Plants | 5 | D | D | D |
| Cut Christmas Trees Harvested | 3 | X | 1 | D |
| Nursery Crops | 6 | D | 35 | 152 |
| Sod Harvested | 7 | X | 1642 | 2550 |
| Other Nursery and Greenhouse Crops | 5 | D | D | 8 |
*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.