- LFTR (Liquid fluoride thorium reactor)
- LFW (Lomé-Tokoin Airport)
- LFX (Live Fire Exercise)
- lg (Luganda (ISO 639-1 code))
- LGA (LaGuardia Airport)
- LGB (Laser-Guided Bomb)
- LGBT (Lesbian, Gay, Bisexual, Transgender)
- LGBTI (Lesbian, Gay, Bisexual, Transgender & Intersex)
- LGBTQ (lesbian, gay, bi, transgendered and queer)
- LGC (LaGrange-Callaway Airport)
- LGD (La Grande/Union County Airport)
- LGE (Lake Gregory Airport)
- LGF (Laguna Army Airfield)
- LGG (Liège Airport (Bierset Airport))
- LGH (Leigh Creek Airport)
- LGI (Deadman's Cay Airport)
- LGK (Langkawi International Airport)
- LGL (Long Lellang Airport)
- LGLO (Love God, Love Others)
- LGLO's (Latino Greek Lettered Organizations)
- LGM (Little Green Men)