Gorno-Badakhshan Autonomous Province (Tajik: Вилояти Мухтори Кӯҳистони Бадахшон, Viloyati Mukhtori Kūhistoni Badakhshon; Russian: Горно-Бадахшанская автономная область, Gorno-Badakhšanskaya avtonomnaya oblast’) is an autonomous, mountainous province in the east of Tajikistan. Located in the Pamir Mountains, it makes up 45% of the land area of the country but only 3% of the population.
The Tajik name Kuhistoni Badakhshon, now the official name of the province, expresses the meaning Mountainous Badakhshan, which is equivalent to Gorno-Badakhshan, a standard construction derived from Gornîy Badakhšan (Горный Бадахшан) in Russian.