The Kosa (, Komi: ÃÂöÃÂòð) is a river in Perm Krai, Russia, a tributary of the Kama. The river is long and has a basin of . The Kosa freezes up in late October or November and stays icebound until April or early May. It starts in the extreme south of Kosinsky District and flows north. The mouth of the river is near the village of Ust-Kosa. Banks are lowland. There are swamp Ydzhidnyur in the basin of the Kosa.
Main tributaries:
The name of the river is composed of the Komi-Permyak words âÂÂkösâ (dry) and âÂÂvaâ (water), that can be translated as âÂÂdry waterâÂÂ. Komi-Permyak people call the river âÂÂKösvaâÂÂ.