STT may refer to:
Organizations
- ST Telemedia, a portfolio company of Temasek Holdings
- Stabilimento Tecnico Triestino, a shipbuilding company in Italy
- State Street Corp. (NYSE symbol), a US financial services company
- STT Telkom, a telecommunication engineering school
- Suomen Tietotoimisto, a Finnish news agency
- Special Investigation Service, a Lithuanian anti-corruption agency
Computing
- Speech to text, converting spoken audio into text
- Single transaction translator, a particular functional unit in USB hubs
- Spin torque transfer, a computer hardware technology
Other uses
- Cyril E. King Airport (IATA and FAA LID), St. Thomas, U.S. Virgin Islands
- Soft tissue therapy, a physical treatment
- Spinothalamic tract, a sensory pathway from skin to thalamus
- Spread tow tape, in making spread tow fabric
- Stewarton railway station (station code), Scotland