Omsk is a city in Siberia, Russia. It is the administrative center of Omsk Oblast and is located on the banks of the Irtysh River. With a population of over 1.1 million people, it is the second largest city in Siberia after Novosibirsk. Omsk is an important industrial, cultural, and educational center in the region. It is home to several universities, museums, theaters, and other cultural institutions.