LST is a three-character initialism that may refer to:

  • Landing Ship, Tank, a U.S. Navy ship class, of type Amphibious Warfare
  • Laplace-Stieltjes transform, a transform similar to the Laplace transform
  • Launceston Airport
  • Least slack time scheduling
  • Linux Support Team, a defunct German company and Linux distribution
  • Living Systems Theory
  • Local Sidereal Time
  • London School of Theology
  • Löwenheim–Skolem theorem, a theorem in first-order logic dealing with the cardinality of models
  • The Station Code for London Liverpool Street