This descriptive correlational research investigated the relationship of locus of control and self-esteem to the academic performance of junior high school students in a state-managed university. 177 randomly sampled high school students participated in the study. Different research instruments were utilized, namely, 29-item scale of Rotter’s Internal-External Locus of Control Scale and a 10-item scale of Rosenberg’s Self-Esteem Scale. To determine the academic performance of the students, their respective Grade Point Average (GPA) in high school were used. Results provided an insight that junior high school students of both sexes have internal locus of control although females performed on a higher scale compared to males. Likewise, students from different grade levels have internal locus of control. Junior high school students belong to the normal range of self-esteem while female students have slightly higher self-esteem compared to males. Students’ academic performance was found to be satisfactory in both sexes, but when grouped according to their grade levels, Grade 9 has a very satisfactory academic performance compared to other grade levels. Furthermore, there is no significant difference on the locus of control of junior high school students when research participants were grouped according to sex and grade level. Similarly, there exists no significant difference on the self-esteem of junior high school students according to their sex, but when taken according to their grade level, there is a significant difference. Lastly, there is no significant relationship existing among the three variables; the locus of control, self-esteem and academic performance.