Ust-Muny (Russian: Усть-Муны; Altay: Ыны, Inı) is a rural locality (a selo) and the administrative centre of Ust-Munynskoye Rural Settlement of Mayminsky District, the Altai Republic, Russia.

Ust-Muny is located on the Katun River, 47 km south of Mayma (the district's administrative centre) by road.

Barangol is the nearest rural locality.

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