T7 or T-7 may refer to:

Biology

* Thoracic vertebra 7 * Thoracic spinal nerve 7 * T7 phage, a virus used in the study of biological systems ** T7 DNA Helicase, a hexameric motor protein ** T7 RNA polymerase, an RNA polymerase that catalyzes the formation of RNA

Transport

* Île-de-France tramway Line 7 * Olympic Park line, a service of Sydney Trains * Twin Jet's IATA airline code * T7 Bristol–Chepstow, a bus route in the United Kingdom

Vehicles

* T-7 (rocket), China's first sounding rocket * Boeing T-7 Red Hawk, an American advanced jet trainer aircraft * Fuji T-7, a Japanese primary trainer aircraft * Yugoslav torpedo boat T7, Yugoslav torpedo boat ''T7'' * T7 Armored Car, a prototype vehicle for the US Army * T7 Combat Car, a prototype vehicle for the US Army * T-7 Navigator or Beechcraft Model 18, a trainer aircraft used by the United States armed forces * T7, a model of the OS T1000 train of the Oslo Metro * LSWR T7 class, an experimental 4-2-2-0 steam locomotive built in 1897

Other uses

* 2C-T-7, a hallucinogenic phenethylamine * T7, television station in Kosovo * T-Seven or Judith Hildebrandt, a singer and former member of Mr. President (band), Mr. President * A tornado intensity rating on the TORRO scale {{Letter-NumberCombDisambig