Belogradchik Municipality (Bulgarian: Община Белоградчик) is a municipality (obshtina) in Vidin Province, Northwestern Bulgaria, located in the western parts of the so-called Fore-Balkan area. It is named after its administrative centre - the town of Belogradchik. To the west and southwest, the municipality borders on Republic of Serbia.
The area embraces a territory of 411 km (159 sq mi) with a population of 7,045 inhabitants, as of December 2009.
Belogradchik (Bulgarian: Белоградчик, lit. 'Small White Town'; pronounced [bɛɫoɡrɐtˈt͡ʃik]) is a town in Vidin Province, northwestern Bulgaria, and is the administrative centre of the homonymous municipality. The town is situated in the foothills of the Balkan Mountains just east of the Serbian border and about 50 km south of the Danube River. The town is close to the Belogradchik Rocks, which are major tourist attraction. As of 2024, it had a population of 4,601.