This study investigated psycho-social predictors of parental involvement in the academic activities of junior secondary school students in Port Harcourt Metropolis. The study was guided by four research questions and their corresponding null hypotheses. The design for the study was correlational research design. The population of the study consisted of 16,835 parents of 24,343 JSS3 students (Source: School Board, 2024) from 278 public secondary school students in Port Harcourt Metropolis (Post Primary Education Board, 2024). A sample of 689 parents who are alive and can read and write, as reported by their children (The JSS3 students) was used for the study. Multi-stage sampling procedure was used in drawing the sample. Four instruments were used for the study. They are, Self-efficacy Scale (SES), Locus of Control Scale (LCS) Family Conflict Scale (FCS) and Parental Involvement Scale (PIS). The validity of the instruments were done by two experts in Educational Psychology. To ensure the reliability of the instruments Cronbach alpha () technique was used. The alpha coefficients of 0.75, 0.82, 0.67 and 0.76 were obtained for family conflict, self-efficacy, locus of control and parental involvement scale respectively. Multiple regression, simple regression and ANOVA were used for data analysis. Research questions 1 and 3 were answered using simple regression, research question 2 and 4 were answered using multiple regression. Hypotheses I and 3 were tested using ANOVA associated with simple regression while hypotheses 2 and 4 were tested using ANOVA associated with multiple regression. All analyses were done at 0.05 alpha level. Results revealed among others that self-efficacy did not significantly predict parental involvement in the academic activities of junior secondary school students in Port Harcourt Metropolis while locus of control and family conflict significantly predicted parental involvement in the academic activities of junior secondary school students in Port Harcourt Metropolis. It was recommended amongst others that parents should always make effort to exhibit internal locus of control as this will help them get better involved in the academic activities of their children.