Izhevsk is the capital city of Udmurtia, Russia. It is situated along the Izh River, west of the Ural Mountains in Eastern Europe. It is the 21st-lar…Izhevsk is the capital city of Udmurtia, Russia. It is situated along the Izh River, west of the Ural Mountains in Eastern Europe. It is the 21st-largest city in Russia, and the most populous in Udmurtia, with over 600,000 inhabitants.