Total population (1990 census): 304715
County seat: Waukesha
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 239 | 31508 | 4117655 bu | |
| Wheat for Grain, Total | 63 | 1710 | 90024 bu | |
| Spring Wheat | 3 | 26 | D | |
| Winter Wheat | 61 | 1684 | D | |
| Barley | 7 | 745 | 28203 bu | |
| Oats | 96 | 1648 | 101666 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 144 | 21699 | 962925 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 292 | 15146 | 39012 tons, dry | |
| Alfalfa Hay | 267 | 10436 | 28930 tons, dry | |
| Small Grain Hay | 15 | 395 | 568 tons, dry | |
| Tame Hay | 28 | 741 | 1685 tons, dry | |
| Wild Hay | 25 | 475 | 421 tons dry | |
| Grass Silage | 57 | 3099 | 22233 tons, grn | |
| Corn for Silage | 87 | 3062 | 50675 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Snap Bean | 8 | D | ||
| Beets | 4 | D | ||
| Head Cabbage | 7 | D | ||
| Cantaloupes | 6 | 5 | ||
| Carrots | 3 | D | ||
| Cucumbers & Pickles | 7 | 8 | ||
| Dry Onions | 5 | 7 | ||
| Green Peas | 4 | D | ||
| Hot Peppers | 8 | 4 | ||
| Sweet Peppers | 10 | 21 | ||
| Potatoes | 4 | 10 | 800 bu | |
| Pumpkins | 25 | 95 | ||
| Spinach | 3 | 1 | ||
| Squash | 12 | 31 | ||
| Sweet Corn | 31 | 731 | ||
| Tomatoes | 15 | 18 | ||
| Watermelons | 4 | 1 | ||
| Other Vegetables | 8 | 14 | ||
| Fruits | Farms | Acres | Yield | |
| Apples | 15 | 61 | 5386 trees | |
| Raspberries | 11 | 12 | 11161 lbs | |
| Strawberries | 3 | Z | 940 lbs | |
| 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 | 83 | 526670 | 1387 | 10059 |
| Nursery, Floriculture, Vegetable and Flower Seed Crops | 15 | X | 71 | X |
| Florculture Crops | 38 | 508590 | 14 | 4090 |
| Bedding/Garden Plants | 33 | 298705 | 11 | 2474 |
| Cut Flowers and Cut Florist Greens | 5 | D | D | D |
| Potted Flowering Plants | 7 | D | D | 1478 |
| Cut Christmas Trees Harvested | 15 | X | 101 | 187 |
| Nursery Crops | 22 | D | 841 | 5383 |
| Sod Harvested | 7 | X | 150 | 218 |
| Other Nursery and Greenhouse Crops | 14 | D | 256 | 180 |
*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.