The Mongolian world, defined as a historically shaped and dynamically developing historical and cultural space, is a wonderful platform for the studying of migration processes and the phenomenon of diaspora. It embodies interactions of both traditional migration processes and modern cross-border and trans-regional migrations. It formed emigration and immigration flows. In the context of intensive and incomplete of nation-building processes occurring in various segments of the Mongolian historical and cultural space, models of integration of migrants to host societies, diaspora groups and institutions are shaped. A comprehensive study of the entire diversity of migration processes can both generate new knowledge about the development of the body of interest and contribute to the development of migration and diaspora theories.