'Asir is a region of Saudi Arabia.

Asir may also refer to:

• Asir-e Esfahani, poet
• Asir, Iran
• Asir District
• Asir Rural District

• Asir Mountains
• Asir National Park

• Idrisid Emirate of Asir
• Sheikdom of Upper Asir

• Æsir, the gods of Norse mythology
• Asiri (disambiguation)