Harakat Ahrar al-Sham al-Islamiyya (Arabic: حركة أحرار الشام الإسلامية, translit. Ahrār al-Shām, lit. 'Islamic Movement of the Free People of the Levant'), commonly referred to as Ahrar al-Sham, is a coalition of multiple Islamist and Salafist units that coalesced into a single brigade in order to fight against the Syrian Government led by Bashar al-Assad during the Syrian Civil War. Ahrar al-Sham was led by Hassan Aboud until his death in 2014. In July 2013, Ahrar al-Sham had 10,000 to 20,000 fighters, which at the time made it the second single most powerful unit fighting against al-Assad, after the Free Syrian Army. It was the principal organization operating under the umbrella of the Syrian Islamic Front and was a major component of the Islamic Front. With an estimated 20,000 fighters in 2015, Ahrar al-Sham became the largest rebel group in Syria after the Free Syrian Army became less powerful. The group along with Jaysh al-Islam are the main rebel groups supported by Turkey and Saudi Arabia.
The group aims to create an Islamic state under Sharia law, and was for a time openly allied with Jabhat Fateh al-Sham (formerly the Al-Nusra Front, an affiliate of al-Qaeda) until a rift in January 2017 that has since been healed.