Oymyakonsky District is an administrative and municipal district, one of the thirty-four in the Sakha Republic, Russia. It is located in the east of the republic and borders with Ust-Maysky District in the southwest, Tomponsky District in the west, Momsky District in the north, Susumansky District of Magadan Oblast in the east, and with Okhotsky District of Khabarovsk Krai in the south. The area of the district is 92,300 square kilometers (35,600 sq mi). Its administrative center is the urban locality of Ust-Nera. Population: 10,109 (2010 Russian census); 14,670 ; 31,078 (1989 Soviet census). The population of Ust-Nera accounts for 63.9% of the district's total population.

Sakha, officially the Republic of Sakha (Yakutia), is the largest republic of Russia, located in the Russian Far East, along the Arctic Ocean, with a population of one million. Sakha comprises half of the area of its governing Far Eastern Federal District, and is the world's largest country subdivision, covering over 3,083,523 square kilometers (1,190,555 sq mi). Yakutsk, which is the world's coldest major city, is its capital and largest city.