Russkoye Ustye (Russian: Ру́сское У́стье; Sakha: Русскай Устье) is a rural locality (a selo), the only inhabited locality, and the administrative center of Russko-Ustinsky Rural Okrug of Allaikhovsky District in the Sakha Republic, Russia, located 120 kilometers (75 mi) from Chokurdakh, the administrative center of the district. Its population as of the 2010 Census was 157, down from 181 recorded during the 2002 Census.