The Olonka (Russian: Олонка, Karelian: Anuksenjogi) is a river in the Republic of Karelia, Russia.

[2] The section between Topornoye and Utozero is now referred to as Topornaya [ru] (Топорная).

[3][4] The highest point of this drainage chain is Kaskozero, which overspills into Lake Pyyre Järvi (Pyureyarvi, Пюреярви), which is connected by a shallow creek to Topornoye.

[5] Most important tributaries are Megrega (by Olonets) and Tuksa [ru] rivers.

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