LGM can refer to:

• Last Glacial Maximum

Little Green Men

• Little Green Men, stereotypical portrayal of extraterrestrials
• The first pulsar was initially dubbed LGM-1 for "Little Green Men"

LGM - silo-launched surface-attack guided-missile

• LGM-25 Titan
  • LGM-25 Titan I ICBM
  • LGM-25 Titan II ICBM
• LGM-30 Minuteman ICBM
• LGM-118 Peacekeeper ICBM

Other

• LGM Luftfahrt GmbH Mannheim
• Libre Graphics Meeting

eo:LGM fr:LGM it:LGM