The purpose of this study was to assess the individual and social predictors of prosocial behavior among adolescents in Fasilo Secondary and Preparatory School. The study employed correlational survey research design. The study also used quantitative approach. Fasilo Secondary and Preparatory School students were the participant of this study. Of these student, 423 students (Males= 211 and females =212) were selected using Stratified random sampling technique considering representativeness of male and female students as well as grade levels. Standardized and self-developed instrument was used as a data collection instrument. The data were analyzed by using mean, one-sample t-test, independent sample t-test, one-way ANOVA, correlation and multiple regressions. The finding showed that adolescents engaged most commonly in emotional prosocial behaviors. The study revealed that adolescents manifested slightly higher prosocial behavioral tendency. Furthermore, female students had higher level of prosocial tendency than male students. In addition the result points out that, grade 9 students account a statistical significant difference in prosocial behavior than the upper grade level in the school. The result also reported that empathic concern was significantly positive associated with prosocial tendency. The results of multiple regressions also examined that emphatic concern is the most important predictor of prosocial tendency. Keywords: Adolescents, predictors, prosocial behavior, students. th