T11 may refer to:

Anatomy Eleventh thoracic vertebra Thoracic spinal nerve 11

Aviation Marathon T.11, a British trainer aircraft T-11 Kansan, an American trainer aircraft T-11 parachute, used by the United States Army Yap International Airport, in the Federated States of Micronesia

Rail and transit Lines Île-de-France tramway Line 11 Express, France Line 11, part of the Blue Line (Stockholm Metro), in Sweden

Locomotives Prussian T 11, a steam locomotive

Stations Arahata Station, Nagoya, Aichi Prefecture, Japan Dainichi Station, Osaka, Japan Kayabachō Station, Tokyo, Japan Kikusui Station, Sapporo, Hokkaido, Japan Sanjō Keihan Station, Kyoto, Japan Sanuki-Shirotori Station, Higashikagawa, Kagawa Prefecture, Japan

Other uses T11 (classification), a disability sport classification T11 (satellite) Autovía T-11, a highway in Catalonia, Spain DEC T-11, a microprocessor Estonian national road 11 T11 road (Tanzania)

Gilbern T11, a concept car Robbins Island language Simca-Gordini T11, a racing car Soyuz T-11, a 1984 space mission T11 torpedo T11, on the TORRO scale of tornado intensity