Abstract: The object of this research is the migration behavior of youth, while the subject is the specificity of formation of migration behavior among the young people in Irkutsk Oblast. We can observe various manifestations of migration behavior among this age group, which can consist in a high motivation towards migration, or a complete rejection thereof. The author thoroughly examines the socio-environmental factors of determination of the migration behavior, as well as defines the level of their impact upon the establishment of migration trends. In the last decades, there is a large youth migration outflow from Irkutsk Oblast. The study aimed at revelation of the migration trends, demonstrated that the model of migration behavior among youth of Irkutsk Oblast forms under the direct influence of socio-environmental factors, as well as subjective characteristics of the respondents. The author analyzes the motivating and demotivating factors, and determines the correlations between external and internal factors of determination of the migration behavior.