- Tanning Salons, Colleyville
- Tattoo Covering & Removing, Colleyville
- Tattooing, Colleyville
- Tax Services, Colleyville
- Technical Illustrations, Colleyville
- Telecommunications, Colleyville
- Telecommunications Consultants, Colleyville
- Telephone Communication Service & Phone Companies, Colleyville - Local & Long Distance Telephone Service
- Telephone Equipment & Phone Systems, Colleyville - Sales, Service & Repair
- Television Stores & Dealers, Colleyville
- Testing Calibration & Gauge Testing Labs, Colleyville
- Testing Laboratories, Colleyville - Lab Tests
- Therapeutic Massage Clinics, Colleyville - Massage Therapy Centers
- Thrift Stores, Resale & Consignment Shops, Colleyville
- Title & Surety Insurance, Colleyville
- Title Companies, Colleyville - Title Search, Service & Abstract Company
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- Towing Service, Colleyville
- Tractors Equipment & Supplies, Colleyville
- Trailer Rental & Leasing, Colleyville
- Training Centers, Colleyville
- Trampoline Equipment, Colleyville
- Transmission Repair & Service, Colleyville
- Transportation, Colleyville
- Transportation Equipment And Supplies - Except Motor Vehicle, Colleyville
- Transportation Equipment Manufacturers, Colleyville
- Transportation Rental & Leasing, Colleyville
- Transportation Repair & Maintenance, Colleyville
- Travel & Tourism, Colleyville
- Travel Arrangement & Services, Colleyville
- Truck Rental & Leasing, Colleyville - Rent a Truck & Tractor
- Tutoring Instructor, Colleyville
- TV Stations & Broadcasting Companies, Colleyville - Cable TV Networks, Talk Shows, etc
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