- T-Shirt Manufacturers, North York
- Tanning Salons, North York
- Tattooing, North York
- Tax Return Preparation, North York
- Tax Services, North York
- Taxi Cab Service, North York
- Taxi Service, North York
- Technological Research & Development, North York
- Telecommunications, North York
- Telecommunications Companies, Businesses & Services, North York
- Telephone Communication Service & Phone Companies, North York - Local & Long Distance Telephone Service
- Telephone Directory Publishers, North York - Publishers - Directory & Guide
- Telephone Equipment & Phone Systems, North York - Sales, Service & Repair
- Telephone Jack & Wiring - Installation & Repair, North York - Phone Jack - Wiring
- Television Stores & Dealers, North York
- Temp Agencies, North York
- Temporary & Contractor Agencies, North York
- Terrazzo Tile Marble & Mosaic Contractors, North York
- Thai Restaurants, North York
- Theater & Sport Ticket Agencies, North York
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- Thrift Stores, Resale & Consignment Shops, North York
- Tile Contractors - Install & Repair, North York - Ceramic & Porcelain Tile Flooring - Kitchen & Bathroom
- Tile Supplies, North York - Tile Stores - Companies
- Tire Retread, Regroove & Repair Equipment, North York
- Tires - Wholesale & Retail, North York
- Title & Surety Insurance, North York
- Tool & Die Makers, North York
- Tourist Attractions, North York
- Towing Service, North York
- Toy Stores, North York
- Translators & Interpreters, North York
- Transportation, North York
- Transportation Rental & Leasing, North York
- Travel & Tourism, North York
- Travel Arrangement & Services, North York
- Truck Rental & Leasing, North York - Rent a Truck & Tractor
- Truck Repair & Service, North York
- Trust Companies, North York
- Tutoring Instructor, North York
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