Lensk is located on the left bank of the Lena River, at the southern edge of the Lena Plateau, approximately 840 kilometers (520 mi) west of Yakutsk, the capital of the republic.[11]
The original settlement was founded as Mukhtuya (Мухтуя) in 1663 by Russian fur traders, on the site of an older Evenk settlement known as Mukhtuy.[citation needed] The name of the original settlement was derived from an Evenk term meaning "great water".
During the 19th and early 20th centuries, it was a place of political exile. It experienced a period of rapid growth during the 20th century as a result of the discovery and development of diamond deposits in the Vilyuy Riverbasin. As the closest significant settlement to the major kimberliteexcavations at the Mir Mine and the establishment of the associated townofMirny, Mukhtuya became a major base of construction. In 1956, roads were built connecting Mukhtuya to the future Mirny and the port was established. On July 13,[citation needed] 1963, Mukhtuya was granted town status[1] and was given its present name, after the river on which it stands.[citation needed]
In May 2001, Lensk briefly came to the world's attention when almost the entire town was flooded and a large amount of the buildings destroyed. The floods were caused by river ice blocking the river downstream, creating a dam. The town was largely rebuilt after the flooding.
In addition to its association with the diamond industry and construction, Lensk has a significant forestry and timber sector and a large-panel housing factory. The town is also home to the Yakutalmaz scientific research organization.
Lensk is connected with Mirny by road and has scheduled air connections with Mirny, Yakutsk, and Irkutsk from the Lensk Airport. As a major port on the Lena, the town has developed as a processing point for the regional diamond industry.
Lensk has a history museum and operates a branch of the Irkutsk Polytechnic Institute. A karst cave with a 25-meter (82 ft) waterfall and a karst lake is located 7 kilometers (4.3 mi) southwest of the town.
Lensk has a strongly continental subarctic climate (Köppen climate classificationDfc). Winters are severely cold and long with average temperatures ranging from −34.1 to −25.3 °C (−29.4 to −13.5 °F) in January, while summers are warm and brief with average temperatures ranging from +10 to +23.9 °C (50.0 to 75.0 °F) in July. Precipitation is moderate and is significantly higher in summer than at other times of the year.
^Всесоюзная перепись населения 1979 г. Национальный состав населения по регионам России [All Union Population Census of 1979. Ethnic composition of the population by regions of Russia] (XLS). Всесоюзная перепись населения 1979 года [All-Union Population Census of 1979] (in Russian). 1979 – via Demoscope Weekly (website of the Institute of Demographics of the State University—Higher School of Economics.
Official website of the Sakha Republic. Registry of the Administrative-Territorial Divisions of the Sakha Republic. Lensky District. (in Russian)
Государственное Собрание (Ил Тумэн) Республики Саха (Якутия). Закон №172-З №351-III от 30 ноября 2004 г. «Об установлении границ и о наделении статусом муниципального района муниципальных образований Республики Саха (Якутия)», в ред. Закона №1535-З №597-V от 27 ноября 2015 г. «О внесении изменений в статьи 1 и 2 Закона Республики Саха (Якутия) "Об установлении границ и о наделении статусом муниципального района муниципальных образований Республики Саха (Якутия)"». Вступил в силу со дня официального опубликования. Опубликован: "Якутия", №245, 31 декабря 2004 г. (State Assembly (Il Tumen) of the Sakha (Yakutia) Republic. Law #172-Z No. 351-III of November 30, 2004 On Establishing the Borders and on Granting the Municipal District Status to the Municipal Formations of the Sakha (Yakutia) Republic, as amended by the Law #1535-Z No. 597-V of November 27, 2015 On Amending Articles 1 and 2 of the Law of the Sakha (Yakutia) Republic "On Establishing the Borders and on Granting the Municipal District Status to the Municipal Formations of the Sakha (Yakutia) Republic". Effective as of the day of the official publication.).
Государственное Собрание (Ил Тумэн) Республики Саха (Якутия). Закон №173-З №353-III от 30 ноября 2004 г. «Об установлении границ и о наделении статусом городского и сельского поселений муниципальных образований Республики Саха (Якутия)», в ред. Закона №1058-З №1007-IV от 25 апреля 2012 г. «О внесении изменений в Закон Республики Саха (Якутия) "Об установлении границ и о наделении статусом городского и сельского поселений муниципальных образований Республики Саха (Якутия)"». Вступил в силу со дня официального опубликования. Опубликован: "Якутия", №245, 31 декабря 2004 г. (State Assembly (Il Tumen) of the Sakha (Yakutia) Republic. Law #173-Z No. 353-III of November 30, 2004 On Establishing the Borders and on Granting the Urban and Rural Settlement Status to the Municipal Formations of the Sakha (Yakutia) Republic, as amended by the Law #1058-Z No. 1007-IV of April 25, 2012 On Amending the Law of the Sakha (Yakutia) Republic "On Establishing the Borders and on Granting the Urban and Rural Settlement Status to the Municipal Formations of the Sakha (Yakutia) Republic". Effective as of the day of the official publication.).
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