Oka River

This page is for a river in western Russia. For other places with the same name, see Oka.

Oka (Russian: Ока́) is a large river in Russia, the largest right tributary of the Volga. It flows through the Oblasts of Oryol, Tula, Kaluga, Moscow, Ryazan, Vladimir and Nizhny Novgorod. Its length exceeds 1500 km (932 miles).

The name of Oka is cognate to aqua, the Latin word for "water" ^{[[Citing sources citation needed]]}, and to the name of the Aa Rivers. Historically, the river gave its name to the Upper Oka Principalities, situated upstream from Tarusa. One of the largest Russian cities, Nizhny Novgorod, was founded to protect the Oka's confluence with the Volga. The Russian capital, Moscow, sits on one of the Oka's tributaries - the Moskva River.

Cities and towns on Oka

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