Omsk (Russian: Омск) is a city in southwest Siberia in Russia, the administrative center of Omsk Oblast. It is the second-largest city in Russia beyond the Urals. The distance from Omsk to Moscow is 2,700 km.
In the Russian Empire, it 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 1918–1919, it was proclaimed the Capital of Russia, and held the imperial gold reserves.
Omsk is the administrative center of Siberian Cossacks, the see of the bishop of Omsk and Tara, and the imam of Siberia.