The main purpose of the study was to examine the civic engagement of school adolescents as a function of parental and school civic socialization, and social media with the mediating role of perceived competence for civic action. The research employed a correlational design. Participants were 1530 school adolescents in Addis Ababa aged 15-to-19-years (Mean age was 17.7) drawn through multi-stage sampling procedures.Findings indicated that all the three independent variables (parental civic socialization, school civic experience and social media use) were able to exert statistically significant positive direct and indirect effects on civic engagement.