Usun-Kyuyol (; , Uhun Küöl) is a rural locality (a selo), the only inhabited locality, and the administrative center of Arylakhsky Rural Okrug of Suntarsky District in the Sakha Republic, Russia, located from Suntar, the administrative center of the district. Its population as of the 2010 Census was 667, down from 800 recorded during the 2002 Census.