Yatmas Dusay (Tatar: Ятмас Дусай) is a rural locality (a selo) in Kukmara District, Tatarstan, Russian Federation.

The population was 348 as of 2010.

[1] Yatmas Dusay is located 29 km from Kukmara, district's administrative centre, and 131 km from Kazan, republic's capital, by road.

[2][3] The earliest known record of the settlement dates from 1619.

There are 3 streets in the village.