This study investigated effect of psychodynamic, cognitive behavioural and group approaches in managing dependent personality disorder (DPD) among secondary school students in Rivers State. Two research questions and two hypotheses guided the study. The study adopted a quasi-experimental design involving pre-test and post-test. A sample size of 80 students was drawn from the population of 400 students using the simple random sampling as well as the non-proportionate sampling technique. The Dependent Personality Disorder Questionnaire (PDQ-IV-TR, DSM-IV) was used as instrument for data collection (Adapted from the work of Hyler 2002). Validity of the instrument was done by the supervisor and two experts in measurement and evaluation. Reliability was done via Cronbach Alpha and a reliability index of 0.94 was realized. Mean, standard deviation, t-test, analysis of Covariance (ANCOVA) and analysis of variance (ANOVA) were used for data analysis. Result showed that; psychodynamic therapy (PT), cognitive behaviour therapy (CBT) and group therapy (GT) had a significant effect on management of dependent personality disorder among subjects; there is a significant effect of psychodynamic therapy, CBT and group therapy on management of DPD among male and female participants as shown by their post test scores. Recommendations were made among which is that continuous assessment of the students should be done in order to ensure their continuous retention of the treatment in managing dependent personality disorder (DPD).