# Ust-Aldansky District

Ust-Aldansky District (Russian: Усть-Алда́нский улу́с; Yakut: Уус-Алдан улууһа, Uus-Aldan uluuha, Yakut pronunciation:) 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 18,300 square kilometers (7,100 sq mi). Its administrative center is the rural locality (a selo) of Borogontsy. Population: 22,155 (2010 Census); 22,372 (2002 Census); 21,389 (1989 Soviet 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:
* Yakuts: 98.9%
* Evenks: 0.6%
* Russians: 0.2%
* other ethnicities: 0.3%

## Economy

The economy of the district is mostly based on agriculture.

## Inhabited localities

Municipal composition :
| Rural settlements | Population | Male | Female | Rural localities in jurisdiction* |
| Batagaysky Nasleg (Батагайский) | 542 | 261 (48.2%) | 281 (51.8%) | selo of Khomustakh |
| Bayagantaysky Nasleg (Баягантайский) | 699 | 350 (50.1%) | 349 (49.9%) | selo of Tanda |
| Bert-Usovsky Nasleg (Берт-Усовский) | 783 | 380 (48.5%) | 403 (51.5%) | selo of Syrdakh selo of Chiryapchi |
| Borogonsky Nasleg (Борогонский) | 1,009 | 506 (50.1%) | 503 (49.9%) | selo of Tumul selo of Ary-Tit selo of Elyasin |
| Byariyinsky Nasleg (Бярийинский) | 297 | 159 (53.5%) | 138 (46.5%) | selo of Byariye |
| Dyupsyunsky Nasleg (Дюпсюнский) | 1,536 | 752 (49.0%) | 784 (51.0%) | selo of Dyupsya selo of Byadi selo of Stoyka |
| Kurbusakhsky Nasleg (Курбусахский) | 1,105 | 562 (50.9%) | 543 (49.1%) | selo of Us-Kyuyol selo of Balagannakh selo of Okoyemovka |
| Legyoysky Nasleg (Легёйский) | 1,527 | 719 (47.1%) | 808 (52.9%) | selo of Kepteni selo of Daly selo of Khomustakh |
| Legyoysky 2-y Nasleg (Легёйский 2-й) | 614 | 285 (46.4%) | 329 (53.6%) | selo of Tuluna |
| Myuryunsky Nasleg (Мюрюнский) | 6,015 | 2,813 (46.8%) | 3,202 (53.2%) | selo of Borogontsy (Administrative centre of the district) selo of Myndaba selo of Tomtor |
| Nayakhinsky Nasleg (Наяхинский) | 1,020 | 504 (49.4%) | 516 (50.6%) | selo of Balyktakh |
| Oltyokhsky Nasleg (Ольтёхский) | 1,040 | 502 (48.3%) | 538 (51.7%) | selo of Beydinga selo of Arylakh |
| Onyorsky Nasleg (Онёрский) | 616 | 298 (48.4%) | 318 (51.6%) | selo of Eselyakh |
| Ospyokhsky Nasleg (Оспёхский) | 319 | 156 (48.9%) | 163 (51.1%) | selo of Dygdal |
| Ospyokhsky 1-y Nasleg (Оспёхский 1-й) | 534 | 270 (50.6%) | 264 (49.4%) | selo of Usun-Kyuyol |
| Suottunsky Nasleg (Суоттунский) | 1,929 | 938 (48.6%) | 991 (51.4%) | selo of Ogorodtakh selo of Sasylykan selo of Khonogor |
| Tit-Arynsky Nasleg (Тит-Арынский) | 238 | 143 (49.7%) | 145 (50.3%) | selo of Tit-Ary |
| Tyulyakhsky Naleg (Тюляхский) | 538 | 269 (50.0%) | 269 (50.0%) | selo of Kylayy |
| Khorinsky Nalseg (Хоринский) | 593 | 276 (46.5%) | 317 (53.5%) | selo of Mayagas |
| Khorinsky 1-y Nalseg (Хоринский 1-й) | 664 | 316 (47.6%) | 348 (52.4%) | selo of Charang |
| Cherikteysky Nasleg (Чериктейский) | 487 | 235 (48.3%) | 252 (51.7%) | selo of Cheriktey |
Divisional source: Population source: *Administrative centers are shown in bold