Oy (; ) is a rural locality (a selo), the only inhabited locality, and the administrative center of Nemyuginsky Rural Okrug of Khangalassky District in the Sakha Republic, Russia, located from Pokrovsk, the administrative center of the district.Registry of the Administrative-Territorial Divisions of the Sakha Republic Its population numbered 2,302 per 2021 census, up from the 2010 Census, where the population was 2,266,This figure is given for Nemyuginsky Rural Settlement, a municipal formation of Khangalassky Municipal District. According to Law #173-Z 353-III, Oy is the only inhabited locality on the territory of this municipal formation. but down from 2,305 recorded during the 2002 Census.

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Sources Official website of the Sakha Republic. Registry of the Administrative-Territorial Divisions of the Sakha Republic. Khangalassky District.