Adolescence is a period in which individuals face significant physical, emotional, social and cognitive changes. The fact that young people are in a positive state in areas such as emotional balance, self-confidence, identity development, social relationships and coping with stress is related to their psychological well-being. Adolescence is often a period of intense search for identity. Adolescents can search for their religious identities and understand themselves better in this process. In this study, it was aimed to examine the relationship between psychological well-being and religiosity in a sample of adolescents from a descriptive and relational perspective. In order to achieve this goal, an introductory section on the concepts of psychological well-being and religiosity was prepared by first reviewing the literature. Then, the psychological well- being and religiosity scales determined for data collection were applied to 1356 adolescents between the ages of 13 and 18 and data were collected. The collected data were subjected to analysis. As a result of the analysis, it was found that adolescents' psychological well-being and religiosity averages were high. In terms of psychological well-being level, 7th grade students had the highest mean scores and 8th grade students had the lowest mean scores; in terms of religiosity level, 7th grade students had the highest mean scores and 10th, 11th and 12th grade students had the lowest mean scores.