Total population (1990 census): 281912
County seat: Mason
Crop Statistics (1997 US Census of Agriculture)
| Cereals | Farms | Acres | Yield | |
| Maize=Corn | 296 | 49310 | 5403825 bu | |
| Wheat for Grain, Total | 213 | 18481 | 1056354 bu | |
| Spring Wheat | 5 | 203 | 8210 bu | |
| Winter Wheat | 211 | 18278 | 1048144 bu | |
| Barley | 3 | (D) | (D) | |
| Oats | 39 | 836 | 58837 bu | |
| Grain Legumes | Farms | Acres | Yield | |
| Soybean | 305 | 48705 | 1755431 bu | |
| Dry Edible Beans, Excluding Dry Limas | 4 | (D) | (D) | |
| Potatoes | 3 | 9 | (D) | |
| Sugar Beets for Sugar | 4 | 12 | 256 bu | |
| Forages | Farms | Acres | Yield | |
| Total Hay* | 396 | 18466 | 50741 tons, dry | |
| Alfalfa Hay | 346 | 13487 | 39961 tons, dry | |
| Small Grain Hay | 16 | 338 | 1031 tons, dry | |
| Tame Hay | 65 | 1128 | 2513 tons, dry | |
| Wild Hay | 25 | 398 | 699 tons dry | |
| Grass Silage | 45 | 3115 | 19593 tons, grn | |
| Corn for Silage | 95 | 5682 | 81703 tons, grn | |
| Sorghum for Silage | 4 | 135 | 1445 tons, grn | |
| Vegetables | Farms | Acres | Yield | |
| Asparagus | 3 | (D) | ||
| Snap Bean | 7 | 2 | ||
| Beets | 3 | (D) | ||
| Broccoli | 5 | 2 | ||
| Head Cabbage | 5 | 5 | ||
| Cucumbers & Pickles | 5 | 2 | ||
| Eggplant | 3 | (Z) | ||
| Herbs, Fresh Cut | 4 | 1 | ||
| Dry Onions | 5 | 265 | ||
| Hot Peppers | 3 | (D) | ||
| Sweet Peppers | 8 | 4 | ||
| Pumpkins | 12 | 22 | ||
| Squash | 7 | 5 | ||
| Sweet Corn | 9 | 111 | ||
| Tomatoes | 8 | 10 | ||
| Fruits | Farms | Acres | Yield | |
| Apples | 17 | 244 | 25525 trees | |
| Cherries, Total | 5 | 8 | (D) | |
| Sweet Cherries | 3 | (D) | (D) | |
| Tart Cherries | 4 | (D) | (D) | |
| Grapes | 3 | (D) | (D) | |
| Peaches | 4 | (D) | (D) | |
| Pears | 3 | (D) | (D) | |
| Other Fruits and Nuts | 5 | 20 | 861 | |
| Tame Blueberries | 4 | 10 | 20713 lbs | |
| Raspberries | 6 | 18 | 23600 lbs | |
| Strawberries | 4 | (D) | (D) | |
| Other Crops | Farms | Acres | Yield | |
| Herbs, Total | 4 | 1 | (X) | |
| Maple Trees Tapped (Number of Taps) | 11 | 127 | 8330 | |
| 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 | 67 | 343563 | 2579 | 4969 |
| Nursery, Floriculture, Vegetable and Flower Seed Crops | 10 | (X) | (D) | (X) |
| Florculture Crops | 16 | 323887 | 10 | 1973 |
| Bedding/Garden Plants | 10 | 183217 | 3 | 1219 |
| Cut Flowers and Cut Florist Greens | 4 | (D) | (D) | (D) |
| Potted Flowering Plants | 5 | 90510 | (D) | 393 |
| Cut Christmas Trees Harvested | 27 | (X) | 147 | 306 |
| Nursery Crops | 19 | 8576 | 205 | 954 |
| Sod Harvested | 5 | (X) | 1755 | 1611 |
| Other Nursery and Greenhouse Crops | 22 | (D) | 462 | (D) |
*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.