Karasuk (Russian: Карасук; Altay: Кара-Суу, Kara-Suu) is a rural locality (a selo) in Kyzyl-Ozyokskoye Rural Settlement of Mayminsky District, the Altai Republic, Russia.

Karasuk is located on the Katun River, 33 km southeast of Mayma (the district's administrative centre) by road.

Kyzyl-Ozyok is the nearest rural locality.

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