The Kamasins (; Kamassian: ) are a collection of tribes of Samoyedic peoples in the Sayan Mountains who lived along the Kan River and Mana River in the 17th century in the southern part of today's Krasnoyarsk Krai.
In the 2010 and 2021 Russian censuses, two people identified as Kamassian and listed under the subgroup "other nationalities". Also, 21 people, comprising 0.5% of the population of Sayansky District, are declared as Kamasins and their descendants by the district administration in the official tourist guide (2021).
thumb|Kamassian settlement — the stand of the Uner rural locality at the Sayan Bird Fest, [[Aginskoye, Krasnoyarsk Krai|Aginskoye, July 2023]]
History
thumb|Kamassian family in Abalakovo village, 1925
The origins of the Kamasins remain obscure but it is believed that they are descended from Proto-Samoyed tribes. Around the 17th century, the Kamasins moved and settled along the Kan and Mana rivers. Later on the Kamasins were partly Turkicized.
The Taiga and Steppe Kamasins
In the late 19th century, the Kamasins were split into two groups: the Taiga and the Steppe Kamasins,
Later history
Many of the Kamasins had assimilated into the Russian peasantry by the early 20th century. The Kamasins are now ethnically classified as Koibal Khakass or Russian. indicates that there are no more than 50 descendants of Kamasins.
In the All-Russian population censuses of 2010