Ust-Muta (Russian: Усть-Мута; Altay: Моты-Оозы, Motı-Oozı) is a rural locality (a selo) and the administrative centre of Ust-Mutainskoye Rural Settlement, Ust-Kansky District, the Altai Republic, Russia.

Ust-Muta is located 42 km north of Ust-Kan (the district's administrative centre) by road.

Keley is the nearest rural locality.

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