The purpose of this study is to determine whether there is a relationship between self-esteem, locus of control and multidimensional perfectionism, and the extent to which the variables of self-esteem, locus of control and multidimensional perfectionism contribute to the prediction of subjective well-being. The study was carried out with 318 final year (fourth grade) university students. Subjective Well-Being Scale, Rosenberg Self-Esteem Scale, Rotter Internal External Locus of Control Scale and Multi-Dimensional Perfectionism Scale were used in the study. Correlation Coefficient of Pearson Moments and Gradual Regression Analysis were used in the analysis of the data. As a consequence, it was determined that there is a positive relationship between subjective well-being and self-esteem, and a negative relationship between subjective well-being and locus of control and multi-dimensional perfectionism. Also, it was observed that the variables of self-esteem, locus of control and multidimensional perfectionism significantly predict subjective well-being.