- Games & Hobbies, Oscoda
- Garage, Door & Window Products, Oscoda
- Garbage & Rubbish Removal, Oscoda
- Garden & Lawn Sprinkler Repair, Installation & Service, Oscoda
- Garment & Linen Services, Oscoda
- Gas Engine, Oscoda
- Gas Station, Oscoda - Service & Filling Station
- General Business Consulting, Oscoda
- General Business Services, Oscoda
- General Consultants, Oscoda
- General Hardware Stores, Oscoda
- General Merchandise Stores, Oscoda
- General Surgeons, Oscoda - General Surgery Doctors, Physicians & Surgeons
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- Generators, Compressors, Pumps, Motors & Fans, Oscoda
- Gift Shops, Oscoda - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Oscoda
- Glass & Glass Products, Oscoda
- Glass - Auto, Float, Plate, Window & Doors, Oscoda
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Oscoda
- Golf Courses, Oscoda
- Government, Oscoda
- Greeting Card Stores, Oscoda
- Grocery Stores & Supermarkets, Oscoda
- Ground Transportation, Except Passenger, Oscoda
- Gun Repair & Services, Oscoda
- Guns & Gunsmith Services, Oscoda
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