Ust-Kumir (Russian: Усть-Кумир; Altay: Кайрукун, Kayrukun) is a rural locality (a selo) and the administrative centre of Talitskoye Rural Settlement, Ust-Kansky District, the Altai Republic, Russia.

Ust-Kumir is located 38 km northwest of Ust-Kan (the district's administrative centre) by road.

Talitsa is the nearest rural locality.

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