RGA

RGA may refer to:

• Hermes Quijada International Airport in Río Grande, Tierra del Fuego Province, Argentina (IATA code)
• R/GA, an international advertising agency
• Reallexikon der germanischen Altertumskunde. a German-language encyclopedia of the history of the Germanic peoples
• Red-Green Alliance (Denmark), a far left-wing political party in Denmark
• Regenerative amplification, a process of amplifying laser pulses with a resonator
• Reinsurance Group of America, a reinsurance company
• Relative Gain Array, a tool to determine optimal input-output pairings for MIMO systems
• Renzo Gracie Academy, MMA gym
• Republican Governors Association, an association for governors in the United States who belong to the United States Republican Party
• Residual gas analyzer, a small mass spectrometer
• Restricted Growth Association, a UK charity that supports people with dwarfism
• Return Goods Authorization, returning goods to the supplier for repair or replacement
• Rezerva generală a aviației, the General Aviation Reserve of Romania which operated between 1916 and 1919.
• Roller Girls of the Apocalypse, a roller derby league based in Kaiserslautern, Germany
• Royal Garrison Artillery, a pre-1930 corps of the British Army