Ansar ul Islam or Ansar al-Islam (; "Partisans of Islam" or "Helpers of Islam") may refer to:
Ansar al-Islam in Kurdistan, a Kurdish Salafist group in Northern Iraq. Jama'at Ansar al-Islam, a Kurdish-dominated Salafist group in Iraq and Syria. Ansar al-Islam (Bangladesh) also called Ansarullah Bangla Team, a radical islamist group in Bangladesh. Ansar ul-Islam (Pakistan), a Barelvi Sunni Muslim group in the Khyber Agency, Federally Administered Tribal Areas, Pakistan. Ansarul Islam (Kashmir), founded in 1983 and merged into Hizbul Mujahideen in 1989. Ansarul Islam (Sahel), an organization in Burkina Faso and Mali. Jabhat Ansar al-Islam, Syrian rebel group. Ansar-ul-Hussain, a Shia Pakistani group which was allegedly responsible for recruiting fighters for Liwa Zainabiyoun.