Byuteydyakh (; , Büteydeex) is a rural locality (a selo), one of two settlements, in addition to Dyullyukyu, in Botulunsky Rural Okrug of Verkhnevilyuysky District in the Sakha Republic, Russia. It is located from Verkhnevilyuysk, the administrative center of the district and from Dyullyukyu. Its population as of the 2010 Census was 8, of whom 7 were male and 1 female, down from 17 as recorded during the 2002 Census.