The Oka riverbank in Nizhny Novgorod
Map of the Volga watershed with the Oka highlighted
|Cities||Oryol, Kaluga, Serpukhov, Kolomna, Ryazan, Murom, Dzerzhinsk, Nizhny Novgorod|
|Main source||Oryol Oblast
226 m (741 ft)
67 m (220 ft)
|Length||1,500 km (930 mi)|
|Basin size||245,000 km2 (95,000 sq mi)|
The Oka (Russian: Ока́, IPA: [ɐˈka]) is a river in Russia. It is a tributary of the Volga River. The Moskva River, which is the main river in Moscow, flows into it. The river is very long and is 1,500 km (930 mi) long.
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Oka (river) Facts for Kids. Kiddle Encyclopedia.