- Tattooing, Montauk
- Taxi Cab Service, Montauk
- Taxi Service, Montauk
- Telecommunications, Montauk
- Tennis Court Construction, Montauk - Resurfacing & Repair
- Tennis Lessons, Montauk - Includes Badminton Coaching
- Thrift Stores, Resale & Consignment Shops, Montauk
- Tile Supplies, Montauk - Tile Stores - Companies
- Tools & Hardware Supplies, Montauk
- Tours & Guide Services, Montauk
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- Towing Service, Montauk
- Toy Stores, Montauk
- Transportation, Montauk
- Transportation Facilities & Services, Montauk
- Transportation Rental & Leasing, Montauk
- Travel & Tourism, Montauk
- Travel Arrangement & Services, Montauk
- Trenching Contractors, Montauk - Trencher - Excavation Contractors
- Trucking - Garbage, Refuse, Waste, Trash, Scrap & Junk Removal, Montauk - Collection, Removal, Disposal, Recycling, etc
- Tugboat & Towing Service, Montauk
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