STX may be:
- An abbreviation for South Texas
- STX (sports manufacturer), a sports manufacturer based in Baltimore, Maryland.
- STX Entertainment, a Los Angeles-based motion picture production and distribution company.
- A common abbreviation for St Croix, U.S. Virgin Islands.
- An abbreviation for St Cross College, Oxford.
- A secure private telephone network used by London Stock Exchange affiliated firms and professionals.
- Henry E. Rohlsen Airport ( IATA: STX), an airport on St. Croix, U.S. Virgin Islands.
- Studentereksamen, an examination used in Denmark for the secondary school called gymnasium.
STX Corporation, System Technology Excellence, a Korea-based holding company
- STX Offshore & Shipbuilding, a subsidiary of STX Corporation
- STX Pan Ocean, a Korea-based shipping company, subsidiary of STX Corporation
- Streaming Transformations for XML, an XML transformation language.
- Start of Text, a control code in the C0 control code set.
- Seagate Technology, a manufacturer of hard disk drives for PC and many entertainment devices, based on its stock symbol STX.
- Saxitoxin, a neurotoxin found in marine dinoflagellates.
- An acronym for Star Trek Nemesis (Star Trek X)
- Case STX Steiger
- Shiga toxin
- Filename extension of the PASTI raw disk image format for the Atari ST
- Structured Text, a plaintext markup language.1
STX (a contraction of the word "sticks" but commonly called "S-T-X") is a global sports equipment manufacturer based in Baltimore, Maryland. It is a subsidiary of Wm. T. Burnett & Co. STX makes lacrosse equipment, field hockey equipment, ice hockey equipment, and golf putters, but its main business is in manufacturing of men's and women's lacrosse sticks and protective gear, including gloves, pads, and women's eyewear. The company was founded in 1970 by Richard B.C. Tucker, Sr. as STX Inc. STX's first stick was the double wall, synthetic lacrosse head (U.S. Pat. #3,507,495), which was the first synthetic stick and the only type used to score goals in the first NCAA Men's Lacrosse Championship (1971).
STX is one of the largest manufacturers of lacrosse equipment, and in Maryland, part of the $66+ million industry.