- Teen Connection
- TEI
- Teksystems
- Tektronix
- Telco
- Tele-Care
- Telecheck
- Teleco
- Telecom Llc
- Tele-Communications
- Teleperformance USA
- Telephone Answering Service
- Telephone Connection
- Telephone Man
- Telephone Pioneers of America
- Teleport Communications Group
- Tele-Rep
- Telesis Express
- Tellabs
- Telstar Communications
- Temecula Valley Bank
- Temperature Control
- Temple Beth Shalom
- Temple Beth Sholom
- Temple B'Nai Israel
- Temple Emanu-El
- Temple Of Faith
- Temple of Praise
- Temple Shalom
- Temps
- Ten Perfect Nails
- Tencarva Machinery
- Tender Care
- Tender Loving Care
- Tender Years
- Tenneco Packaging
- Tennessee Farmers Co-op
- Tennessee Farmers Mutual Insurance
- Tennessee Gas Pipeline