SX

SX may mean:
* Ŝ, the letter in the Esperanto alphabet
* "SX News", a gay and lesbian newspaper based in Sydney, Australia.
* Sex
* Skybus Airlines, the airline's IATA Airline Code
* Simplex communication, in radio
* South Georgia and the South Sandwich Islands, FIPS PUB 10-4 territory code
* "Straight edge", a lifestyle and (countercultural) subculture (also known as sXe)
* Symphony X, a progressive power metal band
* Sonic X, a Japanese anime
* Supercross
* A type of Multi-mode optical fiber
* SX is the aircraft registration prefix for Greek aircraft.
* the SX range of microcontrollers made by Ubicom and sold by Parallax Inc.