Ust-Aldansky District (, Uus-Aldan uluuha, ) is an administrative and municipal district (raion, or ulus), one of the thirty-four in the Sakha Republic, Russia. It is located in the center of the republic and borders with Kobyaysky District in the north, Tomponsky District in the northeast, Tattinsky District in the east, Churapchinsky District in the southeast, Megino-Kangalassky District in the south, and with Namsky District in the west. The area of the district is 18300 km2. Its administrative center is the rural locality (a selo) of Borogontsy. Population: 22,372 (2002 Census); The population of Borogontsy accounts for 23.6% of the district's total population.

Geography

The landscape of the district is mostly flat. Its main rivers include the Lena and the Aldan. There are many lakes in the district, the largest of which are Lakes Myuryu, Oner, and Targyldzhyma.

History

The district was established on January 9, 1930.

Demographics

As of the 2021 Census, the ethnic composition was as follows:

Economy

The economy of the district is mostly based on agriculture.

Inhabited localities

Divisional source: Population source: *Administrative centers are shown in bold

Sources