For the first time, data was published on the location of settlements of Tatar Tara Group, on the right bank of the Irtysh River at the end of the 18th century in the territory of the modern Omsk region. This data is on previously rarely used cartographic sources (“Tabula exhibens cursum fluvii Irtisch ab Omskaja Krepost usque ad Tobolsk” 1780, Tara District 1784 and 1798). Other sources from this period were used to verify the findings (Dozornaya kniga Tarskogo uyezda, travel descriptions of Miller, etc.).Purpose. The purpose of this work will be the publication of rarely used cartographic data, their analysis for the localization of settlements of the Turkic-speaking population of the right bank of the Irtysh River in the 18th century.Results. As a result of the data analysis, information was obtained that would help to discover the remains of these objects, find out the settlement system, the features of the life support system of the system and the ethno-cultural history of the population of this region.Conclusion. Map data and written sources of the 18th century indicate that most of the settlements of the Tara Tatars at that time were located in the southern taiga zone in the coastal areas of the right bank of the Irtysh River. Their detection and research will lead to the elucidation of many processes of ethnocultural genesis of the population of Western Siberia.