an-Nabek District (Arabic:منطقة النبك, translit.manṭiqat an-Nabek) is a district of the Rif Dimashq Governorate in southern Syria. Administrative centre is the city of an-Nabek. At the 2004 census, the district had a population of 80,001.
The area of the district is also known as Qalamoun (also transliterated as Qalamun, Qalamūn, Kalamon and Kalamoun).