Omsk is the administrative center and largest city of Omsk Oblast, located in southwestern Siberia, Russia. It serves as a significant urban hub with a population exceeding one million people.
The city ranks as the twelfth-largest city in Russia and the third-largest in Siberia, following Novosibirsk and Krasnoyarsk. It functions as an important transport node, notably serving as a station for the Trans-Siberian Railway and acting as a staging post for the Irtysh River.