Mitiku Hambisa (PhD)Aster Getachew2024-04-032024-04-032023-10https://etd.aau.edu.et/handle/123456789/2677Social media usage, peer pressure, and aggression have been global concerns for the past year and a half and are expected to continue in the coming years. Adolescence is influenced by it and has a higher risk of acquiring aggression. It has been witnessed that there were interventions tried by stakeholders to alleviate its consequence on secondary student/ adolescence, but the most important one is to understand how adolescence is aggressive with social media usage and peer pressure. So the primary goal of this study was to look into the relationship among social media use, peer pressure, and aggression. The study employed a quantitative research approach and a correlational research approach. The primary goal of this study was to look into the relationship between social media use, peer pressure, and aggression. The questionnaires were composed of three scales that were distributed to 403 random samples of secondary school students in Addis Ababa City. All participants filled out the questionnaire appropriately. The collected data was analyzed using descriptive statistics such as frequency, mean, and standard deviation, Pearson product momentum correlation, multivariate analysis of variance (MANOVA), and standard multiple regression. The result indicated that first, peer pressure and aggression had a moderately positive relationship (r =.285, P<.001). Second, social media use and aggression had a moderately positive relationship (r =.267, P<.001). Likewise, aggression was found to be predicted significantly by peer pressure and social media use, which jointly accounted for 28.9% of the variance, respectively. Moreover, by using multivariate analysis of variance (MANOVA), statistically significant results were found in aggression, peer pressure, and social media use with respect to demographic variables such as gender, education, family income, living conditions, and monthly income. The implications of the findings were discussed. The study recommends that the Addis Ababa City Administration Education Office identify the risk factors and design an intervention model for preventing the targeted study population from school-related hazards. Key Words: Aggression, Social Media, Peer Pressure,enThesis