- Tank Cleaning & Draining , Stouffville
- Tanning Salons, Stouffville
- Tax Return Preparation, Stouffville
- Taxi Cab Service, Stouffville
- Taxi Service, Stouffville
- Telecommunications, Stouffville
- Telephone Equipment & Phone Systems, Stouffville - Sales, Service & Repair
- Tent Rentals, Stouffville
- Terrazzo Tile Marble & Mosaic Contractors, Stouffville
- Thai Restaurants, Stouffville
- Thrift Stores, Resale & Consignment Shops, Stouffville
- Tile Contractors - Install & Repair, Stouffville - Ceramic & Porcelain Tile Flooring - Kitchen & Bathroom
- Tire Retread, Regroove & Repair Equipment, Stouffville
- Tires - Wholesale & Retail, Stouffville
- Title & Surety Insurance, Stouffville
- Tourist Attractions, Stouffville
- Towing Service, Stouffville
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- Toy Stores, Stouffville
- Trade Shows, Expositions & Fairs, Stouffville
- Trailer Rental & Leasing, Stouffville
- Translators & Interpreters, Stouffville
- Transmission Repair & Service, Stouffville
- Transportation, Stouffville
- Transportation Equipment Manufacturers, Stouffville
- Transportation Facilities & Services, Stouffville
- Transportation For Handicapped & Elderly, Stouffville - Senior & Disabled
- Transportation Rental & Leasing, Stouffville
- Travel & Tourism, Stouffville
- Travel Arrangement & Services, Stouffville
- Truck Rental & Leasing, Stouffville - Rent a Truck & Tractor
- Truck Repair & Service, Stouffville
- Trucking - Garbage, Refuse, Waste, Trash, Scrap & Junk Removal, Stouffville - Collection, Removal, Disposal, Recycling, etc
- Tutoring Instructor, Stouffville
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