| Cattle Ranching in Isabel, SD (7) | Churches in Isabel, SD (5) |
| General Contractors in Isabel, SD (4) | Automobile Repairing & Service in Isabel, SD (3) |
| Cattle Feedlot in Isabel, SD (3) | Feed - Dealers (Wholesale) in Isabel, SD (3) |
| Schools in Isabel, SD (3) | Ambulance Service in Isabel, SD (2) |
| Ammunition Reloading Equipment & Supls in Isabel, SD (2) | Automobile Body - Repairing & Painting in Isabel, SD (2) |
| Banks in Isabel, SD (2) | Candles - Manufacturers in Isabel, SD (2) |
| City Government - Executive Offices in Isabel, SD (2) | Clinics in Isabel, SD (2) |
| Farm Equipment (Wholesale) in Isabel, SD (2) | Gas - Liquefied Petro - Bttld Bulk (Whol) in Isabel, SD (2) |
| General Crop Farm in Isabel, SD (2) | Grocery - Retail in Isabel, SD (2) |
| Hotels & Motels in Isabel, SD (2) | Junior Colleges & Technical Institutes in Isabel, SD (2) |
| Newspapers (Publishers) in Isabel, SD (2) | Ranches in Isabel, SD (2) |
| Restaurants in Isabel, SD (2) | Schools - Business & Vocational in Isabel, SD (2) |
| Senior Citizens Service in Isabel, SD (2) | Service Stations - Gasoline & Oil in Isabel, SD (2) |
| Wheat Farm in Isabel, SD (2) | Animal Feed & Supplies Nursery in Isabel, SD (1) |
| Automobile Dealers - New Cars in Isabel, SD (1) | Beauty Salons in Isabel, SD (1) |
| Beauty Shop in Isabel, SD (1) | Bible Schools & Study in Isabel, SD (1) |
| Burglar Alarm Systems (Wholesale) in Isabel, SD (1) | Camps in Isabel, SD (1) |
| Cash Grains Farm in Isabel, SD (1) | Cellular Telephones (Services) in Isabel, SD (1) |
| Construction Companies in Isabel, SD (1) | Cooperatives in Isabel, SD (1) |
| Direct Retail Sales in Isabel, SD (1) | Elementary Secondary Schools in Isabel, SD (1) |
| Environmental Excavating Contractor in Isabel, SD (1) | Excavating Contractors in Isabel, SD (1) |
| Fire Departments in Isabel, SD (1) | Fire Protection in Isabel, SD (1) |
| Gasoline Service Station in Isabel, SD (1) | General Contractor in Isabel, SD (1) |
| Goat Dairy And Breeding Stock Goats in Isabel, SD (1) | Grain - Dealers (Wholesale) in Isabel, SD (1) |
| Grocery Stores in Isabel, SD (1) | Highway Street Construction in Isabel, SD (1) |
| Home Contractor in Isabel, SD (1) | Insurance in Isabel, SD (1) |
| Mfg Misc Products Business Services in Isabel, SD (1) | Mfg Ready Mixed Concrete in Isabel, SD (1) |
| Newspapers - Publishing Printing in Isabel, SD (1) | Pawnshop in Isabel, SD (1) |
| Petroleum Bulk Station in Isabel, SD (1) | Petroleum Bulk Station in Isabel, SD (1) |
| Pile Driving in Isabel, SD (1) | Post Offices in Isabel, SD (1) |
| Retreat Houses in Isabel, SD (1) | Sports Medicine & Injuries in Isabel, SD (1) |
| State Bank in Isabel, SD (1) | Trade Contractor in Isabel, SD (1) |
| Trucking - Contract Hauling in Isabel, SD (1) | Us Postal Service in Isabel, SD (1) |
| Whol Farm Garden Machinery in Isabel, SD (1) | Whol Livestock Beef Cattle - Except Feedlot in Isabel, SD (1) |
| Women's Apparel - Retail in Isabel, SD (1) | Yak Ranch in Isabel, SD (1) |
