Currently, the practical implementation of the Historical Geography of Russia project has begun, initiated by the Historical Geography Commission of the Russian Geographical Society together with the departments of social and economic geography, physical geography and the commission of mountain countries of the Russian Geographical Society. Within the framework of the project, it is planned to publish a series of collective monographs, which will be comprehensive historical and geographical characteristics of large regions of the country. The method of time slices is one of the most important in historical and geographical studies, which determines the relevance of the work on its approbation in various disciplines of historical geography, in particular, in the historical geography of the population.