The Uyandina (Russian: Уяндина; Yakut: Уйаандьы, romanized: Uyâncı) is a river in Yakutia, Russia, a tributary of the Indigirka.

[1] The river is formed by the confluence of the 211 kilometres (131 mi) long Irgichyan originating in the NW Selennyakh Range and the 170 kilometres (110 mi) long Baky, which has its source in Lake Baky, located at the junction of the western end of the Polousny Range and the Kyun-Tas.

Finally it meets the left bank of the Indigirka 599 kilometres (372 mi) from its mouth.

[3][4] The Uyandina freezes up in October and remains icebound until late May or early June.

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