| Corn Farm Whol Livestock Soybean Farm in Oldham, SD (8) | General Crop Farm in Oldham, SD (6) |
| Cattle Ranching in Oldham, SD (5) | Churches in Oldham, SD (5) |
| Automobile Repairing & Service in Oldham, SD (2) | Banks in Oldham, SD (2) |
| Bars in Oldham, SD (2) | Grain Elevators in Oldham, SD (2) |
| Retreat Houses in Oldham, SD (2) | Seeds & Bulbs - Wholesale in Oldham, SD (2) |
| Soybean Farm Corn Farm in Oldham, SD (2) | Auctioneers in Oldham, SD (1) |
| Cash Grains Farm Field Crop Farm Ret Nursery Garden Sup in Oldham, SD (1) | City Government - Executive Offices in Oldham, SD (1) |
| Cocktail Lounges in Oldham, SD (1) | Dairy Farm in Oldham, SD (1) |
| Direct Selling Establishments in Oldham, SD (1) | Fraternal Organizations in Oldham, SD (1) |
| Gasoline Service Station in Oldham, SD (1) | Grain - Dealers (Wholesale) in Oldham, SD (1) |
| Health & Diet Foods - Retail in Oldham, SD (1) | Hog Farm Or Feedlot in Oldham, SD (1) |
| Hunting Trips in Oldham, SD (1) | Lawn Garden Services in Oldham, SD (1) |
| Pawnshop in Oldham, SD (1) | Personal Services in Oldham, SD (1) |
| Post Offices in Oldham, SD (1) | Real Property Lessor Vegetable Melon Farm in Oldham, SD (1) |
| Restaurant in Oldham, SD (1) | Restaurants in Oldham, SD (1) |
| Retail & Repair Jewelry in Oldham, SD (1) | Sheep Goat Farm Horses Other Equines Farm in Oldham, SD (1) |
| Small Grains Potatoes Vegetables And Fruits Poultry Dai in Oldham, SD (1) | State Bank in Oldham, SD (1) |
| Television - Cable & Catv in Oldham, SD (1) | Tile & Grout Cleaning & Restoration in Oldham, SD (1) |
| Trade Contractor in Oldham, SD (1) | Trucking Operator - Nonlocal in Oldham, SD (1) |
| Upholstery Furniture Repair in Oldham, SD (1) | Us Postal Service in Oldham, SD (1) |
| Vineyards in Oldham, SD (1) | Wheat Farm in Oldham, SD (1) |
| Whol Livestock in Oldham, SD (1) | Whol Livestock Beef Cattle - Except Feedlot in Oldham, SD (1) |
| Whol Seeds Campground & Whol Greeting Cards in Oldham, SD (1) |
