LSG

LSG can refer to:
 * LSG (band), an R&B group
 * L.S.G., a Techno-Trance project by Oliver Lieb
 * LSG Sky Chefs, an airline catering company
 * Laparoscopic Sleeve Gastrectomy, a surgical weight-loss procedure
 * League of Saint George, a far right group
 * Loss of Strength Gradient, used in the context of military might; a theory that strength declines as distance increases
 * Louisiana State Guard, the state defense force of Louisiana
 * Virgo Supercluster, the Local Supercluster of galaxies
 * Landing Ship Gantry a US Navy World war 2 type ship