Engels (), formerly known as Pokrovsk and Kosakenstadt, is a city in Saratov Oblast, Russia. It is a port located on the Volga River across from Saratov, the administrative center of the oblast, and is connected to it with a bridge. It is the second-largest city in Saratov Oblast with a population of . Historically an important center for Volga Germans, the city was known jointly as Pokrovsk in Russian and as Kosakenstadt in German, until it was renamed after Friedrich Engels in 1931. Engels served as the capital of the Volga German Autonomous Soviet Socialist Republic from 1918 to 1941.