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|Cities||Oryol, Kaluga, Serpukhov, Kolomna, Ryazan, Murom, Dzerzhinsk, Nizhny Novgorod|
|- location||Oryol Oblast|
|- elevation||226 m (741 ft)|
|- location||Nizhny Novgorod|
|- elevation||67 m (220 ft)|
|Length||1,500 km (930 mi)|
|Basin size||245,000 km2 (95,000 sq mi)|
|- average||1,260 m3/s (44,000 cu ft/s)|
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.
References[change | change source]
- "Река Ока". Russian State Water Registry (in Russian).