Tomponsky 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 Momsky District in the northeast, Oymyakonsky District in the east, Ust-Maysky District in the southeast, Tattinsky District in the southwest, Ust-Aldansky and Kobyaysky Districts in the west, and with Verkhoyansky District in the north and northwest. The area of the district is 135,800 square kilometers (52,400 sq mi). Its administrative center is the urban locality of Khandyga. Population: 14,099 (2010 Russian census); 15,275 ; 22,844 (1989 Soviet census). The population of Khandyga accounts for 47.1% of the district's total population.

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.