This study dealt with the influence of peer pressure on adolescents’ social behavior among Grade 11 students at Lorenzo S. Sarmiento Sr. National High School. The primary goal of the study was to determine the level of peer pressure and adolescents’ social behavior in terms of their respective indicators, the significant relationship between peer pressure and adolescents’ social behavior, and what domains of peer pressure substantially influence adolescents’ social behavior. Also, this study utilized a quantitative-correlational design with 202 respondents among Grade 11 students. The average weighted mean, Pearson R, and multiple regression analysis were the statistical tools used in this study. Along with this, the results showed a low level of peer pressure among Grade 11 students in terms of social belongingness, curiosity, cultural parenting orientation, and educational. Likewise, the results showed a high level of adolescent social behavior among Grade 11 students regarding affiliative social behavior, aggressive behavior, and anxious behavior. In addition, there is a negligible correlation and a significant relationship between peer pressure and adolescents’ social behavior. Hence, this leads to the rejection of the null hypothesis. Also, all domains of peer pressure showed low ratings as perceived by students, and all domains of adolescent social behavior showed a high ratings as perceived by students. Additionally, multiple regression analysis showed the result that there was no significant relationship between peer pressure and adolescents’ social behavior. Hence, this led to not rejecting the null hypotheses. Thus, to resist peer pressure, students may attend programs that focus on how to navigate and resist peer pressure. Programs that focus on equipping students with essential skills such as critical thinking, decision-making, communication, and problem-solving, which can help them navigate peer pressure more effectively.