Siny Yar (Russian: Синий Яр; Altay: Кӧк-Јар, Kök-Ĵar) is a rural locality (a selo) in Ust-Koksinsky District, the Altai Republic, Russia.

Siny Yar is located 16 km west of Ust-Koksa (the district's administrative centre) by road.

Tyuguryuk is the nearest rural locality.

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