Novosibirsk is the largest city and administrative centre of Novosibirsk Oblast and the Siberian Federal District in Russia. As of the 2021 Census, it had a population of 1,633,595, making it the most populous city in Siberia and the third-most populous city in Russia after Moscow and Saint Petersburg. The city is located in southwestern Siberia, on the banks of the Ob River.

An administrative centre is a seat of regional administration or local government, or a county town, or the place where the central administration of a commune is located.