Ash'ari is the foremost theological school of Sunni Islam.

Ash'ari or Ashari or Ashaari may also refer to:

• Abu Musa al-Ash'ari was a companion of Muhammad.
• Al-Ash'ari was an Arab Sunni Muslim scholastic theologian.
• Ashari Danoe is an Indonesian footballer.
• Ashari Danudirdjo is an Indonesian sailor.
• Ashari Samsudin is a Malaysian footballer.
• Awal Ashaari is a Malaysian actor.
• Firhan Ashari is a Malaysian field hockey player.