The Vasyugan (Russian: Васюга́н) is a river in the southern West Siberian Plain of Russia.

It is a tributary of the Ob on the left side, and its course from its source in the Vasyugan Swamp[1] is entirely within the Kargasok district of Tomsk Oblast.

The Vasyugan drains a basin of 61,800 square kilometres (23,900 sq mi).

Tributaries: Municipalities (downstream from source): Novy Vasyugan, Aypolovo, Novy Tevriz, Sredny Vasyugan, Staraya Beryozovka, Ust-Chizhapka, Naunak, Bolshaya Griva, Staroyugino, Novoyugino, Bondarka.

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