Total population (1990 census): 19033
County seat: Montezuma
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 607 | 108723 | 14714637 bu | |
| Wheat for Grain, Total | 4 | 70 | 2460 bu | |
| Oats | 165 | 3609 | 246498 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 584 | 97123 | 4615495 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 488 | 24242 | 75394 tons, dry | |
| Alfalfa Hay | 441 | 20175 | 68351 tons, dry | |
| Small Grain Hay | 69 | 1228 | 2473 tons, dry | |
| Tame Hay | 61 | 1536 | 2698 tons, dry | |
| Wild Hay | 8 | 175 | 231 tons dry | |
| Grass Silage | 21 | 1128 | 4925 tons, grn | |
| Corn for Silage | 61 | 1794 | 33281 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Pumpkins | 3 | 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 | 7 | 51000 | 23 | 168 |
| Cut Christmas Trees Harvested | 3 | X | 17 | D |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.