| Regions with significant populations | |
|---|---|
 Russia | ca. 1800[1] |
| Languages | |
| Siberian Tatar, Russian | |
| Religion | |
| Sunni Islam | |
Zabolotnie (Yaskolbinsk) Tatars (Siberian Tatar: сас татарлар; Sas tatarlar) are a subgroup of the Siberian Tatars. They live in the North-West parts of the Tobolsky District, Tyumen Oblast.
Their traditional areas of settlement are separated from Tobolsk, the Russian and Siberian Tatar settlements by Irtysh River, by impassable swamps which is the reason for their name in the Russian language (literally, Tatars who live behind the swamps). This separation also helped them to preserve some elements of their traditional culture, which has been lost by other Siberian groups.[2]
The most widespread among Zabolotnie Tatars is Y-DNA haplogroup N1c2b (80%). Other, more rare haplogroups are N1c1a and O2.
The closest populations to Zabolotnie Tatars are Khanty, Mansi and forest Nenets people, and just a little bit more distant, but also very close, are the Khakas. Because of that geneticists are making conclusion about genetic contribution of Ugric and Samoyedic peoples to the gene pool of Zabolotnie Tatars. It is the high percentage of the haplogroup N1c2b that connects Zabolotnie Tatars to the peoples of the Arctic and South Siberia. It is probably the common heritage of ancient populations of North Eurasia.[3]