SX, Sx, sx, or Sx may refer to:

Medicine Sx, symptoms Sx, surgery

Music SX (band), a Belgian indie pop band S-X, a British producer and singer

Technology .sx, the country code top-level domain for Sint Maarten Betacam SX, a type of videotape for Betacam 1000BASE-SX, a fiber optic gigabit Ethernet standard MAN SX, a range of high mobility tactical trucks Parallax SX, a range of micro-controllers made by Ubicom NEC SX architecture of supercomputers

Other uses SX News, a gay and lesbian newspaper in Australia sx salon, a digital platform providing a forum for critical and creative explorations of Caribbean literature Skybus Airlines (IATA airline code SX) AMA Supercross Championship, a form of off-road motorcycle racing Shanxi, a province of China (Guobiao abbreviation SX) Ŝ, a letter in the Esperanto alphabet Greece (aircraft registration prefix SX)

See also Sx Tape, a 2013 horror film Regulation S-X, regarding financial statements in the United States SpaceX Sussex