Western Siberia or West Siberia ( rus, Западная Сибирь, p=ˈzapədnəjə sʲɪˈbʲirʲ; , ) is a region in

North Asia North Asia or Northern Asia () is the northern region of Asia, which is defined in geography, geographical terms and consists of three federal districts of Russia: Ural Federal District, Ural, Siberian Federal District, Siberian, and the Far E ...

. It is part of the wider region of

Siberia Siberia ( ; , ) is an extensive geographical region comprising all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has formed a part of the sovereign territory of Russia and its predecessor states ...

that is mostly located in the

Russian Federation Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

, with a Southern part in

Kazakhstan Kazakhstan, officially the Republic of Kazakhstan, is a landlocked country primarily in Central Asia, with a European Kazakhstan, small portion in Eastern Europe. It borders Russia to the Kazakhstan–Russia border, north and west, China to th ...

. It lies between the Ural

region In geography, regions, otherwise referred to as areas, zones, lands or territories, are portions of the Earth's surface that are broadly divided by physical characteristics (physical geography), human impact characteristics (human geography), and ...

and the

Yenisei River The Yenisey or Yenisei ( ; , ) is the list of rivers by length, fifth-longest river system in the world, and the largest to drain into the Arctic Ocean. Rising in Mungaragiyn-gol in Mongolia, it follows a northerly course through Lake Baikal a ...

, which conventionally divides Siberia into two halves. Western Siberia covers an area of , nearly 80% of which is located within the

West Siberian Plain The West Siberian Plain () is a large plain that occupies the western portion of Siberia, between the Ural Mountains in the west and the Yenisei, Yenisei River in the east, and the Altai Mountains on the southeast. Much of the plain is poorly d ...

. The largest rivers of the region are the

Irtysh The Irtysh is a river in Russia, China, and Kazakhstan. It is the chief tributary of the Ob (river), Ob and is also the longest tributary in the world. The river's source lies in the Altai Mountains, Mongolian Altai in Dzungaria (the northern p ...

and the Ob. All major rivers of Western Siberia belong to the

Kara Sea The Kara Sea is a marginal sea, separated from the Barents Sea to the west by the Kara Strait and Novaya Zemlya, and from the Laptev Sea to the east by the Severnaya Zemlya archipelago. Ultimately the Kara, Barents and Laptev Seas are all ...

basin. The West Siberian petroleum basin is the largest

hydrocarbon In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are examples of group 14 hydrides. Hydrocarbons are generally colourless and Hydrophobe, hydrophobic; their odor is usually fain ...

(

petroleum Petroleum, also known as crude oil or simply oil, is a naturally occurring, yellowish-black liquid chemical mixture found in geological formations, consisting mainly of hydrocarbons. The term ''petroleum'' refers both to naturally occurring un ...

and

natural gas Natural gas (also fossil gas, methane gas, and gas) is a naturally occurring compound of gaseous hydrocarbons, primarily methane (95%), small amounts of higher alkanes, and traces of carbon dioxide and nitrogen, hydrogen sulfide and helium ...

) basin in the world covering an area of about 2.2 million km², and is also the largest oil and gas producing region in Russia. In

medieval times In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and t ...

, parts of the region were part of the

Golden Horde The Golden Horde, self-designated as ''Ulug Ulus'' ( in Turkic) was originally a Mongols, Mongol and later Turkicized khanate established in the 13th century and originating as the northwestern sector of the Mongol Empire. With the division of ...

. After its gradual decline during the 15th century, the

Khanate of Sibir The Khanate of Sibir (; ) was a Tatar state in western Siberia. It was founded at the end of the 15th century, following the break-up of the Golden Horde.Сибирское ханство // Большая советская энцикл ...

, centered on

Tyumen Tyumen ( ; rus, Тюмень, p=tʲʉˈmʲenʲ, a=Ru-Tyumen.ogg) is the administrative center and largest types of inhabited localities in Russia, city of Tyumen Oblast, Russia. It is situated just east of the Ural Mountains, along the Tura ( ...

, was formed within the area. In the late 16th century, most of Western Siberia was

conquered Conquest involves the annexation or control of another entity's territory through war or coercion. Historically, conquests occurred frequently in the international system, and there were limited normative or legal prohibitions against conquest ...

by the

Russian Empire The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about , roughl ...

, while its southern region became part of the Kazakh Khanate. The current international borders between Russia and

came into being in the late 20th century following the

dissolution of the Soviet Union The Soviet Union was formally dissolved as a sovereign state and subject of international law on 26 December 1991 by Declaration No. 142-N of the Soviet of the Republics of the Supreme Soviet of the Soviet Union. Declaration No. 142-Н of ...

Major cities

The most populous city of Western Siberia is

Novosibirsk Novosibirsk is the largest city and administrative centre of Novosibirsk Oblast and the Siberian Federal District in Russia. As of the 2021 Russian census, 2021 census, it had a population of 1,633,595, making it the most populous city in Siber ...

. Other major cities include: *

Omsk Omsk (; , ) is the administrative center and largest types of inhabited localities in Russia, city of Omsk Oblast, Russia. It is situated in southwestern Siberia and has a population of over one million. Omsk is the third List of cities and tow ...

Surgut Surgut ( rus, Сургу́т, p=sʊrˈgut; Khanty: Сәрханӆ, ''Sərhanł, Сө̆ркут, sörkut'') is a city in Khanty-Mansi Autonomous Okrug, Russia, located on the Ob River near its junction with the Irtysh River. It is one of the fe ...

Barnaul Barnaul (, ) is the largest types of inhabited localities in Russia, city and administrative centre of Altai Krai, Russia, located at the confluence of the Barnaulka and Ob (river), Ob rivers in the West Siberian Plain. As of the Russian Censu ...

Tomsk Tomsk (, ) is a types of inhabited localities in Russia, city and the administrative center of Tomsk Oblast in Russia, on the Tom (river), Tom River. Population: Founded in 1604, Tomsk is one of the oldest cities in Siberia. It has six univers ...

Kokshetau Kokshetau (; , ; rus, Кокшета́у, p=kəkʂɛ'taʊ; ), formerly known as Kokchetav (; ) between 1868 and 1993, is a lakeside city in northern Kazakhstan and the capital of Akmola Region. It stretches along the southern shore of Lak ...

Kemerovo Kemerovo ( rus, Ке́мерово, p=ˈkʲemʲɪrəvə) is an industrial types of inhabited localities in Russia, city and the administrative center of Kemerovo Oblast, Russia, located at the confluence of the Iskitimka River, Iskitimka and Tom ...

Novokuznetsk Novokuznetsk (, , ; )Чиспияков Э. Ф. (1992) ''Учебник шорского языка''. Кемеровское книжное издательство. p. 27. is a city in Kemerovo Oblast (Kuzbass) in southwestern Siberia, Russia ...

Kurgan A kurgan is a type of tumulus (burial mound) constructed over a grave, often characterized by containing a single human body along with grave vessels, weapons, and horses. Originally in use on the Pontic–Caspian steppe, kurgans spread into mu ...

* Pavlodar *

Petropavl Petropavl ( ; ) is a city on the Ishim River in northern Kazakhstan close to the border with Russia. It is the capital of the North Kazakhstan Region. Population: 218,956. Petropavl is about from Kökşetau, northwest of the national cap ...

Semey Semey (; , formerly known as Semipalatinsk ( ) until 2007 and as Alash-Qala ( ) from 1917 to 1920, is a city in eastern Kazakhstan, in the Kazakh part of Siberia. When Abai Region was created in 2022, Semey became its administrative centre. I ...

Oskemen Oskemen ( ) or Ust-Kamenogorsk ( rus, Усть-Каменогорск, p=ˌʊsʲtʲ kəmʲɪnɐˈgorsk) is the largest city in the east of Kazakhstan and the administrative center of East Kazakhstan Region of Kazakhstan. Name The city has two ...

References

{{Authority control Geography of Siberia Geography of Russia Geography of Kazakhstan Regions of Russia