Ust-Yansky District
Усть-Янский улус
Other transcription(s)
 • SakhaУсуйаана улууһа
Ship by the Kyundyulyun, Ust-Yansky District
Ship by the Kyundyulyun, Ust-Yansky District
Flag of Ust-Yansky District
Coat of arms of Ust-Yansky District
Location of Ust-Yansky District in the Sakha Republic
Coordinates: 71°25′N 136°10′E / 71.417°N 136.167°E / 71.417; 136.167
Federal subjectSakha Republic[1]
EstablishedJanuary 5, 1967[2]
Administrative centerDeputatsky[3]
 • Total120,300 km2 (46,400 sq mi)
 • Total8,056
 • Estimate 
7,075 (−12.2%)
 • Density0.067/km2 (0.17/sq mi)
 • Urban
 • Rural
Administrative structure
 • Administrative divisions3 Settlements, 7 Rural okrugs
 • Inhabited localities[3]3 Urban-type settlements[6], 7 rural localities
Municipal structure
 • Municipally incorporated asUst-Yansky Municipal District[7]
 • Municipal divisions[8]3 urban settlements, 7 rural settlements
Time zoneUTC+10 (UTC+10:00 Edit this on Wikidata[9])
OKTMO ID98656000

Ust-Yansky District (Russian: Усть-Я́нский улу́с; Yakut: Усуйаана улууһа, Usuyaana uluuha, IPA: [usujaːna uluːha]) is an administrative[1] and municipal[7] district (raion, or ulus), one of the thirty-four in the Sakha Republic, Russia. It is located in the north of the republic in the Yana River delta on the coast of the Laptev Sea and borders with Allaikhovsky and Abyysky Districts in the east, Momsky District in the south, Verkhoyansky District in the southwest, and with Bulunsky District in the west. The area of the district is 120,300 square kilometers (46,400 sq mi).[3] Its administrative center is the urban locality (a settlement) of Deputatsky.[3] Population: 6,810 (2021 Census);[10] 8,056 (2010 Russian census);[4] 10,009 (2002 Census);[11] 41,265 (1989 Soviet census).[12] The population of Deputatsky accounts for 37.0% of the district's total population.[4]


The main rivers in the district include the Yana, the Omoloy with the Ulakhan-Kyuegyulyur, the Sellyakh, as well as the Chondon with its tributary the Nuchcha. The Kyundyulyun, northernmost spur of the Chersky Range, rises north of Ust-Kuyga. There are numerous lakes in the district. Orotko is one of the largest.[13][14][15]

Average January temperature ranges from −32 to −40 °C (−26 to −40 °F) and average July temperature ranges from +4 to +12 °C (39 to 54 °F).[2] Annual precipitation ranges from 150–200 millimeters (5.9–7.9 in) in the north to 250–300 millimeters (9.8–11.8 in) in the south.[2]


The district was established on January 5, 1967.[2]


Historical population
Source: Census data

As of the 1989 Census, the district had a population of 41,265 inhabitants, with an ethnic composition as follows:[2]

However, a great deal of the ethnic Russian population left with the economic downturn following the collapse of the Soviet Union, so much so that the district lost over three-quarters of its population during the 1990s.

In the 2021 census, the indigenous Yakuts again formed a majority of inhabitants, with the total population now just 6,810. In that year, the ethnic composition of the district was:[16]


The main industries are gold mining, reindeer herding, fishing, and fur trade. There are deposits of gold, tin, tungsten, mercury, lead, zinc, and brown coal.[2]

Inhabited localities

Municipal composition
Urban settlements Population Male Female Inhabited localities in jurisdiction
2983 1447 (48.5%) 1536 (51.5%)
391 208 (53.2%) 183 (46.8%)
979 516 (52.7%) 463 (47.3%)
Rural settlements Population Male Female Rural localities in jurisdiction*
Kazachinsky National Nasleg
(Казачинский национальный наслег)
1367 665 (48.6%) 702 (51.4%)
Omoloysysky National Nasleg
(Омолойский национальный наслег)
433 223 (51.5%) 210 (48.5%)
Silyannyakhsky National Nasleg
(Силянняхский национальный наслег)
771 377 (48.9%) 394 (51.1%)
Tumatsky National Nasleg
(Туматский национальный наслег)
533 286 (53.7%) 247 (46.3%)
Ust-Yansky National Nasleg
(Усть-Янский национальный наслег)
317 166 (52.4%) 151 (47.6%)
Uyandinsky National Nasleg
(Уяндинский национальный наслег)
154 84 (54.5%) 70 (45.5%)
Yukagir National (Nomadic) Nasleg
(Юкагирский национальный кочевой наслег)
128 67 (52.3%) 61 (47.7%)

Divisional source:[17]
Population source:[4]
*Administrative centers are shown in bold



  1. ^ a b Constitution of the Sakha Republic
  2. ^ a b c d e f Center of the Socioeconomic and Political Monitoring. Ust-Yansky District (in Russian)
  3. ^ a b c d e Registry of the Administrative-Territorial Divisions of the Sakha Republic
  4. ^ a b c d Russian Federal State Statistics Service (2011). Всероссийская перепись населения 2010 года. Том 1 [2010 All-Russian Population Census, vol. 1]. Всероссийская перепись населения 2010 года [2010 All-Russia Population Census] (in Russian). Federal State Statistics Service.
  5. ^ "26. Численность постоянного населения Российской Федерации по муниципальным образованиям на 1 января 2018 года". Federal State Statistics Service. Retrieved January 23, 2019.
  6. ^ The count of urban-type settlements may include the work settlements, the resort settlements, the suburban (dacha) settlements, as well as urban-type settlements proper.
  7. ^ a b Law #172-Z #351-III
  8. ^ Law #173-Z #354-III
  9. ^ "Об исчислении времени". Официальный интернет-портал правовой информации (in Russian). June 3, 2011. Retrieved January 19, 2019.
  10. ^ Russian Federal State Statistics Service. Всероссийская перепись населения 2020 года. Том 1 [2020 All-Russian Population Census, vol. 1] (XLS) (in Russian). Federal State Statistics Service.
  11. ^ Federal State Statistics Service (May 21, 2004). Численность населения России, субъектов Российской Федерации в составе федеральных округов, районов, городских поселений, сельских населённых пунктов – районных центров и сельских населённых пунктов с населением 3 тысячи и более человек [Population of Russia, Its Federal Districts, Federal Subjects, Districts, Urban Localities, Rural Localities—Administrative Centers, and Rural Localities with Population of Over 3,000] (XLS). Всероссийская перепись населения 2002 года [All-Russia Population Census of 2002] (in Russian).
  12. ^ Всесоюзная перепись населения 1989 г. Численность наличного населения союзных и автономных республик, автономных областей и округов, краёв, областей, районов, городских поселений и сёл-райцентров [All Union Population Census of 1989: Present Population of Union and Autonomous Republics, Autonomous Oblasts and Okrugs, Krais, Oblasts, Districts, Urban Settlements, and Villages Serving as District Administrative Centers]. Всесоюзная перепись населения 1989 года [All-Union Population Census of 1989] (in Russian). Институт демографии Национального исследовательского университета: Высшая школа экономики [Institute of Demography at the National Research University: Higher School of Economics]. 1989 – via Demoscope Weekly.
  13. ^ "R-53_54 Topographic Chart (in Russian)". Retrieved June 5, 2022.
  14. ^ Google Earth
  15. ^ Topographic map - Kular
  16. ^ "Национальный состав населения". Federal State Statistics Service. Retrieved June 17, 2023.
  17. ^ Ust-Yansky Ulus (Raion) Official website of the Sakha Republic


69°18′39″N 139°58′52″E / 69.31083°N 139.98111°E / 69.31083; 139.98111