沙格镇（阿拉伯语：دقة‎）是突尼斯北部的一处古罗马遗迹，位于首都突尼斯市西南约106公里处，巴杰省泰布尔苏格附近。约始建于公元前6世纪末。曾为努米底亚的行政中心，在古罗马和拜占庭时代达到鼎盛，在伊斯兰统治时期逐步衰落。目前遗址仍有大量气势恢宏的建筑群。1997年被联合国教科文组织列为世界遗产。

Dougga or Thugga (Berber: Dugga, Tugga, Tunisian Arabic:دڨة‎  Doggā) is an ancient Roman city in northern Tunisia, included in a 65 hectare archaeological site.

UNESCO qualified Dougga as a World Heritage Site in 1997, believing that it represents “the best-preserved Roman small town in North Africa”. The site, which lies in the middle of the countryside, has been protected from the encroachment of modern urbanisation, in contrast, for example, to Carthage, which has been pillaged and rebuilt on numerous occasions.