- Games & Hobbies, Onawa
- Garage Door Repair, Onawa
- Garage Doors & Door Operating Devices, Onawa
- Garage Doors & Gates, Onawa - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Onawa
- Garbage & Rubbish Removal, Onawa
- Garment & Linen Services, Onawa
- Gas Station, Onawa - Service & Filling Station
- General Business Services, Onawa
- General Hardware Stores, Onawa
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- General Merchandise Stores, Onawa
- General Travel Agents & Agencies, Onawa
- Gifts, Cards & Stationery Stores, Onawa
- Golf Courses, Onawa
- Government, Onawa
- Grain Elevators, Onawa
- Graphic Design Services, Onawa - Graphic Designer
- Graphic Designer & Artist Services, Onawa
- Grocery Stores & Supermarkets, Onawa
- Ground Transportation, Except Passenger, Onawa
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