Hajin (Arabic: هَجِيْن, Kurdish: Hecîn, also spelled Hajeen) is a small city in the Deir ez-Zor region in eastern Syria, south of Deir ez-Zor.
The Hajin subdistrict consists of four towns which had a collective population of 97,970 in 2004. The al-Shaitat tribe is the largest tribe in the area.
The city came under the occupation of the Islamic State of Iraq and the Levant (ISIL) in 2014, and in late November 2017, Hajin became ISIL’s de facto capital city.
The town was captured by the Syrian Democratic Forces on 14 December 2018 in the Battle of Hajin, after a week and a half of heavy clashes and intense airstrikes by the United States-led Combined Joint Task Force – Operation Inherent Resolve international coalition, and has since been part of the Autonomous Administration of North and East Syria.