The use of social media has contributed to rising aggression and social isolation in adolescents. Current research examined the relationship of social media use, aggression, and social isolation among adolescents. Meezan International School and Divisional Public School were selected for data collection from Sahiwal city. Sample was included 200 participants as 100 girls and 100 boys. This study used UCLA Loneliness Scale, Aggression Questionnaire and Social Use Survey to measure social isolation, aggression, and social media use, respectively. SPSS (27 version) was used for statistical analyses and remarkable findings were obtained. Results of current study depicted that social media usage does not increase the level of aggression and social isolation in adolescents. Further, social isolation increases due to the increase of aggression and vice versa. Moreover, current study depicted that social media use was a significant predictor of aggression and non-significant predictor of social isolation in our society. Furthermore, there was a prominent difference of social media use, aggression and social isolation in adolescent boys and girls. Girls use more social media as compared to boys and boys are more socially isolated and aggressive than girls in adolescence.