STW or StW may refer to:

Business

• Scott Tallon Walker Architects

• Stop the War Coalition, an anti-war group in the United Kingdom

Mathematics

• The Shimura-Taniyama-Weil conjecture, a generalization of Fermat's Last Theorem.

Music

• Salt the Wound, a deathcore band

• Silence the World, third album by the Swedish band Adept

Television

• KSTW, a television station

• Secrets of a Teenage Witch, a 3D animated series

• STW-9, a television station in Perth, Australia

• Scott the Woz, a web comedy review series

Utility companies

• Severn Trent Water

• Sewage treatment, Sewage Treatment Works

Transport

• MTR station code for Sha Tin Wai station, Hong Kong

• National Rail station code for Strawberry Hill railway station, London, England

Other

• Fortnite: Save the World, a survival game

• Search The Web, a milder version of computer jargon acronym STFW

• Shogun: Total War, a PC strategy game.

• Speed through water, nautical term

• Sport Touring Wagon, an alternative marketing name for Crossover (automobile) style vehicles.

• IATA code for Stavropol Shpakovskoye Airport

• Super Tourenwagen Cup, the German Supertouring car championship (until 1999)

• Surviving the World, a daily webcomic.

• "Stop the world", a global pause in a computer program for garbage collection.

• ScrewTurn Wiki, software