Ust-Yansk (Russian: Усть-Янск; Yakut: Усуйаана, Usuyaana) is a rural locality (a selo), the only inhabited locality, and the administrative center of Ust-Yansky Rural Okrug of Ust-Yansky District in the Sakha Republic, Russia, located 486 kilometers (302 mi) from Deputatsky, the administrative center of the district.

[1] Its population as of the 2010 Census was 317,[2] down from 341 recorded during the 2002 Census.

[1]

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