Azerbaijan or Azarbaijan may refer to:

• the Republic of Azerbaijan, a current state in Eurasia:
  • formerly Azerbaijan Soviet Socialist Republic, a Soviet republic (1936–1991)
  • formerly part of Transcaucasian Soviet Federated Socialist Republic, with Armenia and Georgia (1922–1936)
  • formerly Azerbaijan Democratic Republic, a short-lived republic (1918–1920)
• Azarbaijan, a region in northwestern Iran, composed largely of four provinces:
  • East Azarbaijan
  • West Azarbaijan
  • Ardabil
  • Zanjan
• Democratic Republic of South Azerbaijan, a short-lived regional government (1945–1946)
• Atropatene, also Media Atropatene, an historical region/polity

See also

• Azerbaijani language
• Azerbaijani people
• Ancient Azari language
• Medes
• Arran
• Caucasian Albania
• Matiene, also Matiane, Matiani, Matieni, an historical region/polity

آذربایجان (ابهام‌زدایی) | An Asarbaiseáin