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| Wheat Farm in Groton, SD (14) | Insurance in Groton, SD (9) |
| Cattle Ranching in Groton, SD (7) | Corn Farm Whol Livestock Soybean Farm in Groton, SD (6) |
| Real Property Lessor Vegetable Melon Farm in Groton, SD (6) | Schools in Groton, SD (6) |
| Automobile Body - Repairing & Painting in Groton, SD (5) | General Contractors in Groton, SD (5) |
| Service Stations - Gasoline & Oil in Groton, SD (5) | Automobile Dealers - New Cars in Groton, SD (4) |
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| Clubs in Groton, SD (3) | Fire Departments in Groton, SD (3) |
| Hog Farm Or Feedlot in Groton, SD (3) | Retreat Houses in Groton, SD (3) |
| Soybean Farm Corn Farm in Groton, SD (3) | Trucking - Heavy Hauling in Groton, SD (3) |
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| Auto Body Repair Painting in Groton, SD (2) | Automobile Dealers - Used Cars in Groton, SD (2) |
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| Fertilizers (Wholesale) in Groton, SD (2) | Furniture - Dealers in Groton, SD (2) |
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| Police Departments in Groton, SD (2) | Sausages Other Prepared Meat Prod (Mfrs) in Groton, SD (2) |
| Seeds & Bulbs - Retail in Groton, SD (2) | Signs in Groton, SD (2) |
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| Tree Service in Groton, SD (2) | Acoustical Materials in Groton, SD (1) |
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| Beauty Shop in Groton, SD (1) | Bowling Alley in Groton, SD (1) |
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| Business Consulting Services in Groton, SD (1) | Carpentry Contractor in Groton, SD (1) |
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| Computer Related Services in Groton, SD (1) | Concrete Contractor in Groton, SD (1) |
| Cooperatives in Groton, SD (1) | Cosmetics & Perfumes - Retail in Groton, SD (1) |
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| Drug Store in Groton, SD (1) | Electric Companies in Groton, SD (1) |
| Electric Contractors in Groton, SD (1) | Excavating Contractors in Groton, SD (1) |
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| Fire Casualty Insurance Carrier in Groton, SD (1) | Flooring Contractor & Furniture in Groton, SD (1) |
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| Golf Course in Groton, SD (1) | Government Offices in Groton, SD (1) |
| Grain Brokers in Groton, SD (1) | Health Clubs Studios & Gymnasiums in Groton, SD (1) |
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