Total population (1990 census): 42614
County seat: Burlington
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 422 | 68347 | 9334779 bu | |
| Wheat for Grain, Total | 31 | 574 | 30653 bu | |
| Oats | 33 | 419 | 32037 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 417 | 65171 | 3156027 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 239 | 6693 | 19458 tons, dry | |
| Alfalfa Hay | 202 | 5010 | 15521 tons, dry | |
| Small Grain Hay | 27 | 383 | 788 tons, dry | |
| Tame Hay | 45 | 833 | 2011 tons, dry | |
| Grass Silage | 15 | D | D | |
| Corn for Silage | 49 | 911 | 14998 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Cantaloupes | 4 | 11 | ||
| Cucumbers & Pickles | 3 | D | ||
| Pumpkins | 5 | 8 | ||
| Squash | 4 | 10 | ||
| Sweet Corn | 4 | D | ||
| Tomatoes | 3 | D | ||
| Watermelons | 4 | 7 | ||
| Fruits | Farms | Acres | Yield | |
| Apples | 11 | 33 | 3225 trees | |
| Grapes | 3 | 1 | D | |
| Peaches | 4 | 1 | 32 trees | |
| Strawberries | 3 | 1 | 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 | 10 | 62800 | D | 256 |
| Florculture Crops | 6 | D | D | 220 |
| Bedding/Garden Plants | 5 | D | D | 86 |
| Potted Flowering Plants | 3 | D | D | D |
| Cut Christmas Trees Harvested | 4 | X | 20 | 17 |
*Alfalfa, grass silage, green chops etc.
D=Withheld to avoid disclosing data for individual farms.
X=Not applicable.