Afrin District () is a district of Aleppo Governorate in northern Syria. The administrative centre is the city of Afrin. At the 2004 census, the district had a population of 172,095. Syria's Afrin District fell under the control of the People's Protection Units (YPG) around 2012 and an "Afrin Canton" was declared in 2014, followed by an "Afrin Region" in 2017. During Operation Olive Branch, the entire district was captured by Turkey and its allies.