This study sought to examine youth's posttraumatic growth variables. To that end, it examined the relation between socio-demographic variables and traumatic characteristics, personal characteristics and environmental factors on one hand, and posttraumatic growth on the other hand, as well as variables that can significantly forecast posttraumatic growth. 236 young high school students in Seoul and Gyeonggi areas were surveyed, and the corresponding data underwent frequency analysis, descriptive statistic analysis, correlation analysis, difference analysis, and hierarchical regression analysis. The findings of this study revealed that youth's posttraumatic growth demographic variables were religion, and the time of accepting the religion; religious students, compared without non-religious students, had higher posttraumatic growth; those who accepted a religion after trauma had higher posttraumatic growth. Second, the traumatic event that youth experienced the most was the loss of relationship (their family or meaningful death, or parting from their meaningful friends or animals), and their most serious trauma was future career and schoolwork. Third, the relation, except for hope and optimism being irrelevant to self-exposure, was generally statistically significant between youth's traumatic experience on one hand, and personal internal and external hope, emotion and intelligence, elasticity, optimism, self-disclosure, intentional rumination, social support, and posttraumatic growth. Fourth, factors that can significantly forecast youth's posttraumatic growth the most influential variables were social support and hope, and intentional rumination, the latest affliction due to trauma. Thus, youth's posttraumatic growth variables were explored. Based on the findings of this study, suggestions and implications for follow-up research were discussed.