Jama'at Ansar al-Islam (Arabic: جماعة أنصار الإسلام; Congregation of the Supporters of Islam; JAI) was a Salafi jihadist militant group active in Syria and Iraq.

Abu Abdullah al-Shafi'i escaped from the Kurdistan Region, and founded Jamaat Ansar al-Sunna, which was mostly Arab, but also included some Kurds.

[12][13] In November 2008, an archbishop in Mosul received a threat from Jama'at Ansar al-Islam, warning all Christians to leave or be killed.

[15] The group cooperated with the Ahfad al-Rasul Brigades to bomb Syrian military compounds in Damascus in August 2012.

A military commander of the group, Abu Layth al-Tunisi, was reportedly killed in combat during this operation, likely in southwest Aleppo.

[22] Jama'at Ansar al-Islam opposed Turkey after the Idlib demilitarization, and began to directly attack Turkish forces in Syria in March 2019.

[23] On 30 October 2019, Jama'at Ansar al-Islam claimed responsibility for an IED attack on a Popular Mobilization Forces vehicle in the Diyala Governorate in northeastern Iraq.