Altai (, ) is the capital of the Govi-Altai province in western Mongolia. As of 2008, its population is 15,800.
Altai City has a typical Mongolian cold semi-arid climate (Köppen BSk) with subarctic (Dwc) influences. Despite the annual mean temperature of being cold enough for sporadic permafrost, the climate is nearly dry enough to qualify as a cold arid climate (BWk). Altai City experiences long, very dry and very cold winters alongside short, mild summers when the majority of the scant precipitation occurs.
The city receives its water supply from Zavkhan River connected by a 54-km water pipeline through the Taishir-Altai Water Treatment Plant.
The Altai Airport (LTI/ZMAT) has three runways and is served by regular flights to Arvaikheer and Ulaanbaatar.