- Capital: Olgii
- Altitude: 1710 metres
- Population: 90 404 inhabitants (2013)
- Area: 45 700 km²
- Ethnic groups: Kazakh, Uriankhai
- Ecosystem: Altai (high mountains)
Bayan-Olgii is Mongolia’s westernmost aimag. The neighboring Altai mountains are home to glaciers, moraines, lakes and rivers. Seldom found pastoral patches are the grazing ground for some 2 million livestock. Wild predators such as bears, wolves and foxes can also be spotted roaming the region.
While the majority of Mongolia is primarily of the Khalkha ethnic group, 90% of Bayan-Olgii are of Kazakh origin.
Must-See Places in Bayan Olgii
Altai Tavan Bogd national park

Khoton Nuur
Located at the heart of the Altai Tavan Bogd Park, the Khoton nuur lake offers great opportunities for camping and horse riding.