Kösedağ or Kosedag may refer to:
- Mount Kösedağ (Ağrı), a mountain in the province of Ağrı, Turkey
- Mount Kösedağ (Sivas), a mountain in the province of Sivas
- Battle of Köse Dağ, a war between the Anatolian Seljuk State and the Mongolian empire
Kösedağ or Kosedag may refer to: