AAV or Aav may refer to:
Businesses Advantage Oil & Gas Ltd., a Canadian oil and gas company Armstrong Studios, an Australian recording studio later renamed AAV
Language African American Vernacular English Austroasiatic languages, a language group of Southeast Asia
People Aav (surname), Estonian surname Aníbal Acevedo Vilá, governor of Puerto Rico (2005-2008)
Places Aire d'attraction d'une ville, a metropolitan statistical area used by the French national statistics office INSEE Allah Valley Airport in Soccsksargen Region, Philippines (IATA airport code AAV)
Science and technology Adeno-associated virus, a nonpathogenic virus used as a gene therapy tool Air admittance valve, a valve in a drain-waste-vent system Anomalous Aerial Vehicle, a military term for an unidentified flying object Anti-aircraft vehicle, or self-propelled anti-aircraft weapon Assault Amphibious Vehicle or Amphibious Assault Vehicle, an amphibious tracked vehicle
Other uses Another Angry Voice, a British political blog Vatican Apostolic Archive, Latin: Archivum Apostolicum Vaticanum