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
- Virgo Supercluster, the Local Supercluster of galaxies
disambiguation page lists articles associated with the title LSG.
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