Altay or Altai may refer to:

• Altay Mountains

• Altay people an ethnic group
• Altay language
• Altaic languages
• Altay, Xinjiang, also spelled "Aletai", a city in Xinjiang, China
• Altay, Govi-Altay, a city in Govi-Altay Province, Mongolia
• Altai Republic, a federal subject of Russia
• Altai Krai, a federal subject of Russia

• Altay (sheep), a sheep breed
• Altai (company) - a software company known from the Computer Associates Int. Inc. v. Altai Inc. case
• Altay SK - football club from Izmir, Turkey

Altai | Altai | 알타이 | Altai | Altaj | Altai | Алтай | Алтај | Altai | Altaj (olika betydelser)