Beltir (; , Beltir) is a rural locality (a selo) in Beltirskoye Rural Settlement of Kosh-Agachsky District, the Altai Republic, Russia. The population was 77 as of 2016. There are 10 streets.
Beltir is located at the confluence of the rivers Chagan and Taldur, 43 km west of Kosh-Agach (the district's administrative centre) by road. Ortolyk is the nearest rural locality.
In 2003, an earthquake measuring M<sub>w</sub>7.3 struck the region, destroying the village.