The study investigated influence of personality and demographic factors on aggressive behavior among secondary school adolescents. The design for the study is ex-post facto. The population for the study is 180 participants who showed tendency to be aggressive. Two instruments named the NEO-personality and Buss-Perry Scale for aggressive behavior were used to collect data for the study. The reliability of the instruments is 0.83, and 0.78. Two hypotheses were formulated and tested. Hypotheses one was tested with a multiple regression analysis while hypotheses two was tested with a t-test statistics. The data analysis showed that the joint influences of the independent variables were found to be significant. Based on the findings of this study, the researcher recommends that, seminars/workshop should be organized for students and teacher about personality traits and their impacts on students’ academic achievement. This is suggested in order to reduce the incidence of aggressive behavior incidence among secondary schools.
Keywords: Extraversion and Openness to Experience) family type (nuclear and extended) Aggressive Behaviour., Personality (Neuroticism
