Ansar may refer to:
- Ansar, Lebanon, a village in South Lebanon
- Ansar (deity), an ancient Babylonian sky god
- Ansar (military), a class of Arabian warriors
- Ansar (Islam), citizens from Medina who helped the Prophet Muhammad (ﷺ).
- Al-Ansar (Lebanon), a Lebanese football team
- Al-Ansar (Medina), a Saudi Arabian football team
- Ansari (nesbat), a name common in the Middle East and South Asia