LGA may refer to:
- Labor–Green Accord, 1989, between political parties in Tasmania, Australia
- LaGuardia Airport, New York City, US, IATA code
- Land grid array, a microprocessor surface-mount package
- Landesgewerbeanstalt Bayern, a German certification company
- Lansing Grand River Assembly, a General Motors automobile assembly plant
- Large for gestational age
- Lattice gas automaton, a type of cellular automaton
- Liptako–Gourma Authority, a regional development organization in Africa
- Local government area, in several countries
- Local Government Association, England and Wales
- Local government areas of Nigeria, 2nd level administrative division of Nigeria