| Cattle Ranching in Eureka, SD (15) | Churches in Eureka, SD (11) |
| Wheat Farm in Eureka, SD (11) | Insurance in Eureka, SD (10) |
| Cattle Feedlot in Eureka, SD (7) | General Crop Farm in Eureka, SD (7) |
| Real Property Lessor Vegetable Melon Farm in Eureka, SD (6) | Retreat Houses in Eureka, SD (6) |
| Bars in Eureka, SD (5) | Bakers - Retail in Eureka, SD (4) |
| Florists - Retail in Eureka, SD (4) | Libraries - Public in Eureka, SD (4) |
| Schools in Eureka, SD (4) | Veterans & Military Organizations in Eureka, SD (4) |
| Automobile Repairing & Service in Eureka, SD (3) | Cash Grains Farm Corn Farm in Eureka, SD (3) |
| Corn Farm Whol Livestock Soybean Farm in Eureka, SD (3) | Grain - Dealers (Wholesale) in Eureka, SD (3) |
| Newspapers (Publishers) in Eureka, SD (3) | Trucking in Eureka, SD (3) |
| Amusement Recreation Services Fish Hatchery Preserve in Eureka, SD (2) | Attorneys & Lawyers in Eureka, SD (2) |
| Automotive Repair & Service in Eureka, SD (2) | Beauty Salons in Eureka, SD (2) |
| Beauty Shop in Eureka, SD (2) | Cabinets in Eureka, SD (2) |
| Chiropractors in Eureka, SD (2) | Clinics in Eureka, SD (2) |
| Cooperatives in Eureka, SD (2) | Crop Harvesting Services in Eureka, SD (2) |
| Dairy Farm in Eureka, SD (2) | Dentists in Eureka, SD (2) |
| Farm Equipment (Wholesale) in Eureka, SD (2) | Financial Planning Consultants in Eureka, SD (2) |
| Fire Departments in Eureka, SD (2) | Furniture - Dealers in Eureka, SD (2) |
| Government Offices in Eureka, SD (2) | Government Offices - County in Eureka, SD (2) |
| Grain Elevator in Eureka, SD (2) | Grocery - Retail in Eureka, SD (2) |
| Heating Contractors in Eureka, SD (2) | Holding Companies (Bank) in Eureka, SD (2) |
| Hospitals in Eureka, SD (2) | Nursing & Convalescent Homes in Eureka, SD (2) |
| Optometrists Od in Eureka, SD (2) | Pet Washing & Grooming in Eureka, SD (2) |
| Pharmacies in Eureka, SD (2) | Police Departments in Eureka, SD (2) |
| Sewing Contractors in Eureka, SD (2) | Sports Medicine & Injuries in Eureka, SD (2) |
| Theatres - Movie in Eureka, SD (2) | Veterinarians in Eureka, SD (2) |
| Accounting Auditing Bookkeeping in Eureka, SD (1) | Aerial Applicators in Eureka, SD (1) |
| Animal Services in Eureka, SD (1) | Antiques - Dealers in Eureka, SD (1) |
| Appliances - Household - Major - Repairing in Eureka, SD (1) | Art Galleries & Dealers in Eureka, SD (1) |
| Auto Body Repair Painting in Eureka, SD (1) | Automobile Body - Repairing & Painting in Eureka, SD (1) |
| Bakery Shop in Eureka, SD (1) | Barber Shop in Eureka, SD (1) |
| Bed & Breakfast Accommodations in Eureka, SD (1) | Bowling Alley in Eureka, SD (1) |
| Business Consulting Contractor in Eureka, SD (1) | Business Services in Eureka, SD (1) |
| Carpentry Contractor in Eureka, SD (1) | Cash Grains Farm in Eureka, SD (1) |
| Child Day Care Services in Eureka, SD (1) | City Government - Finance & Taxation in Eureka, SD (1) |
| Civic Association in Eureka, SD (1) | Cleaners in Eureka, SD (1) |
| Coffee Shop in Eureka, SD (1) | Coin - Operated Laundry in Eureka, SD (1) |
| Concrete Contractors in Eureka, SD (1) | Construction Companies in Eureka, SD (1) |
| Convenience Stores in Eureka, SD (1) | Drivers License Office in Eureka, SD (1) |
| Driving Instruction in Eureka, SD (1) | Drug Store in Eureka, SD (1) |
| Elementary Secondary School in Eureka, SD (1) | Environmental Excavating Contractor in Eureka, SD (1) |
| Fast Food Diner Restaurant in Eureka, SD (1) | Feed - Dealers (Wholesale) in Eureka, SD (1) |
| Feed - Manufacturers in Eureka, SD (1) | Fencing Contractors in Eureka, SD (1) |
| Fire Casualty Insurance Carrier in Eureka, SD (1) | Florist Gifts Novelties in Eureka, SD (1) |
| Food Markets in Eureka, SD (1) | Funeral Home in Eureka, SD (1) |
| Funeral Home Monument Services in Eureka, SD (1) | Gasoline Service Station in Eureka, SD (1) |
| General Animal Farm in Eureka, SD (1) | General Electrical Contractor in Eureka, SD (1) |
| Golf Courses - Public in Eureka, SD (1) | Grain Elevators in Eureka, SD (1) |
| Guide Service in Eureka, SD (1) | Hardware - Retail in Eureka, SD (1) |
| Hats - Cleaners & Renovators in Eureka, SD (1) | Heavy Equipment Repair & Mfg Mechanical Equipment in Eureka, SD (1) |
