- Games & Hobbies, Portland
- Garage Door Repair, Portland
- Garage Doors & Door Operating Devices, Portland
- Garage Doors & Gates, Portland - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Portland
- Garbage & Rubbish Removal, Portland
- Garden & Lawn Sprinkler Repair, Installation & Service, Portland
- Garment & Linen Services, Portland
- Garment Pressing & Cleaners Agents, Portland - Laundries & Dry Cleaners
- Gas Companies, Portland
- Gas Piping Contractors, Portland - Gas Pipe Installation & Repair Service
- Gas Station, Portland - Service & Filling Station
- Gastroenterologists, Portland - GI Doctors, Physicians & Surgeons (Gastroenterology)
- Gemologists & Jewelers, Portland
- General Business Consulting, Portland
- General Business Services, Portland
- General Consultants, Portland
- General Freight Trucking, Portland - Motor Freight
- General Hardware Stores, Portland
- General Management Consulting Services, Portland - Management Consultants
- General Merchandise Stores, Portland
- General Surgeons, Portland - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, Portland
- Generators, Compressors, Pumps, Motors & Fans, Portland
- Geotechnical Soils Engineer, Portland
- Geriatric Care Management, Portland
- Gift Baskets, Portland
- Gift Plan Service, Portland
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- Gift Shops, Portland - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Portland
- Gifts, Cards & Stationery Stores, Portland
- Glass & Glass Products, Portland
- Glass & Glazing Contractors, Portland
- Glass - Auto, Float, Plate, Window & Doors, Portland
- Glass Decorative, Portland
- Glass Products Manufacturers, Portland
- Glass Rods & Tubing, Portland
- Glass Stained & Leaded, Portland
- Glass Tinting & Coating, Portland - Home - Car Window Tinting
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Portland
- Golf Courses, Portland
- Gourmet Food Stores, Portland
- Government, Portland
- Government And Administration Attorneys & Lawyers, Portland
- Government And Administration Attorneys & Lawyers, Portland
- Government And Administration Lawyers & Attorneys, Portland
- Grape Vineyards, Portland
- Graphic Design Services, Portland - Graphic Designer
- Graphic Designer & Artist Services, Portland
- Greek Restaurants, Portland
- Greeting Card Stores, Portland
- Grocery Store Delivery Service, Portland
- Grocery Stores & Supermarkets, Portland
- Ground Transportation, Except Passenger, Portland
- Gymnastics Schools, Portland
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