Lensk

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.

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. 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 River basin. As the closest significant settlement to the major kimberlite excavations at the Mir Mine and the establishment of the associated town of Mirny, 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, 1963, Mukhtuya was granted town status and was given its present name, after the river on which it stands.

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.

Within the framework of administrative divisions, Lensk serves as the administrative center of Lensky District. As an inhabited locality, Lensk is classified as a town under district jurisdiction. As an administrative division, it is incorporated within Lensky District as the Town of Lensk. As a municipal division, the Town of Lensk is incorporated within Lensky Municipal District as Lensk Urban Settlement.

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 Dfc). Winters are severely cold and long with average temperature −28.3 °C or −18.9 °F in December, although compared to the rest of Yakutia, these temperatures are not severe at all. Summers are brief but quite warm with average temperatures of 18.0 °C or 64.4 °F in July. Precipitation is moderate and is significantly higher in summer than at other times of the year.