Abstract: The subject of this research is the manifestation of self-determination in personal, activity and social self-realization of students. The goal consists in examination of correlation of the parameters of self-determination with personal, activity and social self-realization of students. The research methodology contains the concepts and theories of the following sholars: E. Deci and R. Ryan (people are able to become self-determined when their need for autonomy is fulfilled); D. A. Leontiev (self-determination as the superior form of self-regulation); S. L. Rubinstein (self-determination as an internal condition of activity for self-determination); A. Maslow and K. Rogers (self-realization as a process of personal growth); S. I. Kudinov (polysystemic model of self-realization). The empirical methods of research included: “Test for Self-Determination” of E. N. Osin – modification of the scale of self-determination of K. Sheldon; “Test for Life Meaningful Orientation” of D. A. Leontiev; “Ability to Self-governance” of N. M. Peysakhov; “Questionnaire on Self-Realization” of S. I. Kudinov; “Test for Self-Actualization” of L. Y. Gozman and M. V. Kroz. The result of the conducted research consists in determination of a positive correlation of the meaningfulness of life and self-expression with all types of self-realization. However, in consideration of the link between self-expression and personality, activity and social self-realization following pattern was established: self-expression on high and low levels has a tendency towards decline of the indicators of self-realization; while the average level of self-expression demonstrates higher indicators of personal and activity self-realization of the respondents.