Oka (Russian: Ока́) is a great river in Russia, right confluent of Volga. It flows through the Oblasts of Oryol, Tula, Kaluga, Moscow, Ryazan, Vladimir and Nizhny Novgorod.
Length 1500 km.
Cities and towns on Oka
Oka is also a river in Siberia, left tributary of Angara. It originates in the Sayan Mountains in western Buryatia and flows through Irkutsk Oblast. It flows into the Bratsk reservoir.
Length 630 km.
