Abstract: The subject of the study is the organization of documenting the population registration of the Kangalas Tungus Clans Administration Department for 1768-1917. The purpose of the study is to identify a set of archival documents on the registration of the Kangalas Tungus population preserved during the period 1768-1917, to clarify the type, time and specifics of their creation and to reveal their information capabilities. The geographical scope of the study is limited and corresponds to the area of residence of the clans subordinate to the department of the Kangalas Tungus clans. The methodological basis of the study is the principles of historicism, scientific and objectivity. A systematic approach made it possible to consider the entire set of documents of generic departments as a whole. The method of source analysis made it possible to assess the information value and practical significance of the identified documents. As a result of our work, we have identified a set of documents on the registration of the population of the Kangalas Tungus clans, identified the specifics of their formation and practical use in the activities of the Council, prepared an electronic database containing information about the generic composition and places of nomads. The scientific novelty of the study consists in conducting a source analysis of the identified set of documents of the Kangalas Tungus clans, their information capabilities in recreating the demographic and socio-cultural appearance of the Tungus clans. Based on the results of the work, it was concluded that further research is necessary due to the presence of a large number of unpublished documents. The research materials can be used in the process of teaching historical disciplines, developing textbooks, conducting separate and generalizing studies on the history of the indigenous peoples of the North.