Abstract: In the first part of the proposed article, the information capabilities and methods of processing in electronic databases (EBD) of the first two groups of sources on local population migrations in Russia at the end of the XIX – XX centuries are analyzed and illustrated: 1) pre-revolutionary parish registers, Soviet statistics of registry offices for individual rural and urban settlements, materials of All-Russian censuses population and other census documents containing information about the movement of the population at the micro level of individual settlements; 2) replenished "author's" EBDS of student genealogies (48 information parameters; about 150 thousand personalities as of April 2022) and surveys of women who have completed prolific activities (40 information parameters; 11.5 thousand respondents as of April 2022) The scientific novelty of the proposed study of the information capabilities of the first two blocks of representative sources on local migrations of the Russian population of the history of the period under consideration is provided, first of all, by strict adherence to the principle of historicism, obliging to take what is being studied in motion, in the totality of all its aspects and as it was in the real past. The principle of historicism dictates, in turn, the methodology for creating EBDS of traditional and unique mass sources on social history. Records in metric books, materials of registry offices, population censuses, surveys of elderly women and student genealogies with a truly historical method of obtaining and processing data turn out to be necessary, mandatory and often irreplaceable sources of knowledge and tools for uncovering the mobile socio-natural synergy of domestic new and modern history on the longest and continuous rows of complex demographic and sociographic information. Local migrations are the most important, but part of this synergy.