Kyusyur (Russian: Кюсюр; Yakut: Күһүүр, romanized: Kühüür) is a rural locality (a selo), the only inhabited locality, and the administrative center of Bulunsky Rural Okrug of the Bulunsky District in the Sakha Republic, Russia, located 120 kilometers (75 mi) from Tiksi, the administrative center of the district.

[1] Its population as of the 2010 Census was 1,345;[2] up from 1,336 recorded in the 2002 Census.

[1] One of the world islands in Dubai is named after Kyusyur.

Kyusyur is located by the right bank of the Lena, a few miles south of the mouth of the Eyekit.

[6] Kyusyur has an extremely continental subarctic climate (Dfc, bordering on Dfd) with extremely cold, long winters and very mild, very short summers.