Total population (1990 census): 12324
County seat: Sac City
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 659 | 145454 | 19097215 bu | |
| Wheat for Grain, Total | 3 | 143 | 5708 bu | |
| Barley | 6 | 220 | 12380 bu | |
| Oats | 110 | 1980 | 139693 bu | |
| Popcorn | 12 | 1583 | 4461703 lbs, shelled | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 642 | 141008 | 6521868 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 259 | 7289 | 20305 tons, dry | |
| Alfalfa Hay | 211 | 5316 | 15634 tons, dry | |
| Small Grain Hay | 43 | 716 | 2024 tons, dry | |
| Tame Hay | 45 | 629 | 1061 tons, dry | |
| Wild Hay | 6 | 47 | 53 tons dry | |
| Grass Silage | 17 | 581 | 4602 tons, grn | |
| Corn for Silage | 65 | 2601 | 47796 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Sweet Corn | 5 | 26 | ||
| 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 | 4 | D | D | 103 |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.