SMW is an abbreviation that may stand for

  • Super Mario World, a video game in the Super Mario series by Nintendo
  • Smoky Mountain Wrestling, a defunct wrestling organization run by Jim Cornette.
  • "Springfield's Most Wanted", a television special related to The Simpsons
  • Strategic Missile Wing, US Air Force designation for military units which house nuclear missiles under Strategic Air Command
  • Sherman–Morrison–Woodbury formula, a matrix identity used in linear algebra
  • Special Marine Warning, a weather warning issued by the US National Weather Service for lakes, rivers, or other bodies of water.
  • Semantic MediaWiki, a software extension to MediaWiki
  • Saab Microwave Systems, a division of the Saab corporation