Sandžak is a historical geo-political region located in the southwestern part of Serbia and the eastern part of Montenegro. The name Sandžak derives from the Sanjak of Novi Pazar, a former Ottoman administrative district founded in 1865.

The Sanjak of Novi Pazar was an Ottoman sanjak that was created in 1865. It was reorganized in 1880 and 1902. The Ottoman rule in the region lasted until the First Balkan War (1912). The Sanjak of Novi Pazar included territories of present-day northeastern Montenegro and southwestern Serbia, also including some northern parts of Kosovo. In modern day terms the region is known as Sandžak.