Despite much research on adult posttraumatic growth in recent decades, few studies have focused on posttraumatic growth in the young and especially after experiencing war. This study examined personality factors and different types and sources of social support as key correlates of posttraumatic growth in war-experienced children and adolescents. Participants were 242 individuals from settlements for internally displaced people in Georgia with a mean age of 13.22 years ( SD = 2.73). Relations between variables were examined with correlations, standard multiple regressions, and mediation analyses. Results showed that the main predictors of posttraumatic growth were extraversion, conscientiousness, and social support. In addition, informational type of support from peers related significantly to posttraumatic growth. Moreover, general social support mediated the link between personality factors and posttraumatic growth. Conclusions are drawn on the mechanisms underlying posttraumatic growth in young persons.