An-Nabk District (Arabic: منطقة النبك) is a district (mantiqah) of the Rif Dimashq Governorate in Syria. At the 2004 officical census, the district had a population of 80,001. The centre of the district is the city of An-Nabk.
The area of the district is also known as Qalamoun (also transliterated as Qalamun, Qalamūn, Kalamon and Kalamoun).
The district of Al-Nabk is divided into three sub-districts or Nāḥiyas (population according to 2004 official census):
- An-Nabk nahiyah (ناحية النبك): population 50,747.
- Deir Atiyah nahiyah (ناحية دير عطية): population 29,254.
- Qarah nahiyah (ناحية قارة): population 14,248.