Omsk

For the steamships named Omsk, see SS Omsk.

Not to be confused with Tomsk.

Omsk Омск
City
Top: Omsk State Academic Drama Theater, Fire Observation Tower, (left to right) Middle: Omsk Festival Complex Center area, Vrubel Fine Art Museum, (left to right) Bottom: 60 Years Victory Bridge
Flag Coat of arms
Interactive map of Omsk
Omsk Location of Omsk Omsk Omsk (Omsk Oblast)
Coordinates: 54°59′N 73°22′E
Country	Russia
Federal subject	Omsk Oblast
Founded	August 2, 1716
City status since	1782
Government
• Body	City Council
• Mayor	Sergey Shelest
Area
• Total	566.9 km2 (218.9 sq mi)
Elevation	87 m (285 ft)
Population  (2010 Census)
• Total	1,154,116
• Estimate  (2025)	1,101,367 (−4.6%)
• Rank	7th in 2010
• Density	2,036/km2 (5,273/sq mi)
Administrative status
• Subordinated to	city of oblast significance of Omsk
• Capital of	Omsk Oblast, city of oblast significance of Omsk
Municipal status
• Urban okrug	Omsk Urban Okrug
• Capital of	Omsk Urban Okrug
Time zone	UTC+6 (MSK+3 )
Postal code	644xxx
Dialing code	+7 3812
OKTMO ID	52701000001
City Day	First Saturday of August
Website	admomsk.ru

Omsk is the administrative center and largest city of Omsk Oblast, Russia. It is situated in southwestern Siberia and has a population of over one million. Omsk is the third largest city in Siberia after Novosibirsk and Krasnoyarsk, and the twelfth-largest city in Russia. It is an important transport node, serving as a train station for the Trans-Siberian Railway and as a staging post for the Irtysh River.

One of the central streets in Omsk

Omsk, industrial area

During the imperial era, Omsk was the seat of the governor general of Western Siberia and, later, of the governor general of the Steppes. For a brief period during the Russian Civil War in 1918–1920, it served as the capital of the anti-Bolshevik Russian State and held the imperial gold reserves.

Omsk serves as the episcopal see of the bishop of Omsk and Tara, as well as the administrative seat of the Imam of Siberia. The mayor is Sergey Shelest.