The Zhizdra (Russian: Жиздра) is a river in Kaluga Oblast in Russia, a left tributary of the Oka.

The area of its basin is 9,170 square kilometres (3,540 sq mi).

[1] The Zhizdra freezes up in late November and stays icebound until early April.

The lower course of the Zhizdra is located in Ugra National Park.

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