HAA is the abbreviation for:

  • A house alarm
  • The Army Defense Agency
  • The Herzoglich Arenbergisches Archive
  • The height of platform high altidude Airship by Lockheed Martin

Haa is the name of:

  • A town in Bhutan, see Haa (Bhutan)
  • A district in Bhutan, see Haa (District)
  • Haa, a town in Norway, see Hå

HaA was the youngest Hallstatt period

  • Disambiguation
  • Abbreviation