T
- TAI, Turkish Aerospace Industries – Turkey
- Taifun, Taifun Experimental Design Bureau – Russia
- Taiwan Dancer, Nangang Village, Dayuan District, Taoyuan City, Taiwan
- Tamarind, Tamarind International Ltd – United States
- Tampier, Tampier – France
- Taneja, Taneja Aerospace and Aviation Ltd – India
- Tapanee, Tanapee Aviation Inc – Canada
- Taylor (1), Taylor Aircraft Company – United States
- Taylor (2), Moulton B. Taylor – United States
- Taylor (3), C. Gilbert Taylor – United States
- Taylor (3), Taylor Aero Inc – United States
- Taylor (4), John F. Taylor – United Kingdom
- Taylor Kits, Taylor Kits Corporation – United States
- Taylorcraft (1), Taylorcraft Aircraft – United States
- Taylorcraft (1), Taylorcraft Aviation Company – United States
- Taylorcraft (1), Taylorcraft Aviation Corporation – United States
- Taylorcraft (1), Taylorcraft Inc – United States
- Taylorcraft (2), Taylorcraft Aeroplanes (England) Ltd – United Kingdom, (1938–1946) > Auster
- Taylor-Young, Taylor-Young Airplane Company – United States
- TBM, TBM Corporation – France/United States
- TBM, TBM SA – France
- Teal, Teal Aircraft Corporation – United States
- Team Rocket, Team Rocket Inc – United States
- Team Tango, Revolution Aviation Inc., Williston, Florida, United States
- Tech'aero, Tech'Aero – France
- Technic'air, Belvès, France
- Technoavia, Nauchno-Kommerchesky Firma Technoavia – Russia
- Technoflug, Technoflug Leichtflugzeugbau GmbH – Germany
- Tecma Sport, La Roche-sur-Foron, France
- Tecnam, Costruzioni AeronauticheTecnam Srl – Italy
- Ted Smith, Ted R. Smith & Associates – United States
- Ted Smith, Ted Smith Aerostar Corporation – United States
- Ted Smith, Ted Smith Aircraft Company Inc – United States
- Temco, Temco Aircraft Corporation – United States
- Temco, Texas Engineering & Manufacturing Company Inc – United States
- Tennessee Valley, Tennessee Valley Aviation Products Ltd – United States
- Teratorn Aircraft, Clear Lake, Iowa, United States
- Terr-Mar, Terr-Mar Aviation Corporation – Canada
- Terzi, Terzi Aerodine – Italy
- Texas Airplane, Texas Airplane Factory – United States
- Texas Helicopter, Texas Helicopter Corporation – United States
- Thomas-Martin, Thomas-Martin – Unknown
- Thaden Metal Aircraft Company, United States
- The Airplane Factory, Tedderfield Airpark, Eikenhof, Johannesburg South, South Africa
- Theiss Aviation, Salem, Ohio, United States
- Thorp, John W. Thorp – United States
- Thorp, Thorp 211 Aircraft Company Inc – United States
- Thorp, Thorp Aero Inc – United States
- Thorp, Thorp Aircraft – United States
- Thorp, Thorp Engineering Company – United States
- Thrush, Thrush Aircraft Inc – United States
- Thruster Air Services, Langworth, Lincoln, England, United Kingdom
- Thunder Wings, Thunder Wings, Division of Thunder Development Inc – United States
- Thurston, Thurston Aeromarine Corporation – United States
- Thurston, Thurston Aircraft Corporation – United States
- Tiger, Tiger Aircraft LLC – United States
- Time to Fly, Kaunas, Lithuania
- Time Warp, Time Warp Aircraft Inc – United States
- Tipsy, Ernest Oscar Tips – Belgium
- Titan, Titan Aircraft Company – United States
- TM Aircraft, TM Aircraft – United States
- TNCA, Talleres Nacionales de Construcciones Aeronáuticas – Mexico
- Tomark, Tomark s.r.o., Prešov, Slovakia
- Toyota, Toyota Motor Corporation – Japan
- Tradewind Turbines, Tradewind Turbines Corporation – United States
- Trago Mills, Trago Mills – United Kingdom
- Transall, Arbeitsgemeinschaft Transall – Germany/France
- Transavia Corporation, Transavia Corporation Pty Ltd – Australia
- Transavia, Transavia Division of Transfield (NSW) Pty Ltd – Australia
- Trans-Florida, Trans Florida Aviation – United States, > Cavalier Aircraft
- Travel Air, Travel Air Company – United States, (1924–1931) > Curtiss-Wright Aeronautical Corporation
- Travel Air, Travel Air Manufacturing Company Inc – United States
- Trecker, Trecker Aircraft Corporation – United States
- Trekking Parapentes, Saint-Mathieu-de-Tréviers, France
- Triavio, (Triavio SRL), Catania, Italy
- Tridair, Tridair Helicopters Inc – United States
- Trident, Trident Aircraft Ltd – Canada
- Trio-Twister, Eichwalde, Germany
- TRI-R, Tri-R Technologies Inc – United States
- Triumph, Triumph Group Inc – United States
- Trixy Aviation Products GmbH, Dornbirn, Austria
- Tucker, Tucker Aviation Company – United States
- Tugan Aircraft, Tugan Aircraft Company Limited – Australia, (?-1936) > Commonwealth Aircraft Corporation
- Tupolev, Aviatsionny Nauchno-Tekhnishesky Kompleks Imeni A N Tupoleva OAO – Russia
- Tupolev, Tupolev OKB – Russia
- Turbine Design, Turbine Design Inc – United States
- Turner, E. L. Turner – United States
- TUSAS, TUSAS Aerospace Industries Inc – Turkey
- TUSAS, TUSAS Havacilik ve Uzay Sanayi AS – Turkey
- TUSCO, Tulsa Manufacturing Corporation – United States
- TWI, TWI Flugzeuggesellschaft mbH – Germany