Migration (especially internal) changes sex-age structures substantially both in donor and host areas. As long as migration involves mainly young people, their relocation to the big cities (mainly regional centers) accelerates population ageing in peripheral areas and thus depopulation. Ageing is particularly fast in the Russian hinterland. Here you can find areas with the median age of population reaching the edge of 50 years. The cohort research on youth’s migration to the centers on the last two Russian census data shows that up to 70% of school graduates leave the regional periphery for good. At the end of the article there is an author’s method which presents the attempt to estimate the trend in regional center’s migration attractiveness for the youths.