- Games & Hobbies, Swampscott
- Garage Door Repair, Swampscott
- Garden & Lawn Sprinkler Repair, Installation & Service, Swampscott
- Garden & Lawn Sprinklers Systems – Equipment, Parts & Supplies, Swampscott
- Garment & Linen Services, Swampscott
- Gas Station, Swampscott - Service & Filling Station
- General Business Services, Swampscott
- General Management Consulting Services, Swampscott - Management Consultants
- General Merchandise Stores, Swampscott
- General Travel Agents & Agencies, Swampscott
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- Gift Shops, Swampscott - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Swampscott
- Glass & Glass Products, Swampscott
- Glass - Auto, Float, Plate, Window & Doors, Swampscott
- Government, Swampscott
- Graphic Design Services, Swampscott - Graphic Designer
- Graphic Designer & Artist Services, Swampscott
- Green - Landscape Contractors, Swampscott
- Grocery Stores & Supermarkets, Swampscott
- Gymnastics Schools, Swampscott
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