Due to rise in the Internet access and technologies, the possibilities of conduit for sexual interactions, online pornography, and other type of repetitive behaviours have increased. Hence, the study investigated the psycho-demographic prevalence of pornography among undergraduate students university of Port Harcourt in Rivers state, Nigeria. The sample of 200 undergraduate students was used for the study using Simple random sampling technique vie balloting. Two research questions were answered while two hypotheses were tested in the study at 0.05 level of significance. The instrument for the study was a questionnaire tagged “psycho-demographic prevalence of pornography among undergraduate students” (PPPUS). The data collected were analyzed with mean and standard deviation to answer the research questions while the hypotheses were tested with t-test. From the analysis, it was found out that there is a high prevalence of pornography among male than female undergraduate students in university of Port Harcourt. Furthermore, the findings revealed that and curiosity influence prevalence of pornography among undergraduate students in university of Port Harcourt. Based on the findings, it was recommended that education sector management should come up with curriculum and programs that addresses age- appropriate sex education at all levels and on media forums. This is to provide sexuality information from balanced and objective sources where the adolescent and young adults are free to engage and to seek for clarification on sexuality issues.