Elizabeth Adebola OLATINWO2024-05-232024-05-232022-12Kate TurabianM.EDhttps://repository.lcu.edu.ng/handle/123456789/320Sexual risk behaviour among adolescents is a significant general wellbeing worry for concerned stakeholders because of the serious adverse results with higher pace of school dropout, unfortunate self-idea, demonization, discouragement, sadness, low confidence, poor emotional steadiness and clear future as well as other socio-emotional risk such as event of accidental pregnancies. This study therefore investigated sexuality education, parental involvement and Sexual Risk Behaviours (SRB) among secondary school adolescents in Ibadan Metropolis. The descriptive survey research design was employed. A sample size of six hundred (600) public secondary school adolescents in Ibadan Metropolis were selected using simple random sampling technique. Three research questions were asked and answered, four hypotheses were raised and tested at 0.05 level of significance using mean, standard deviation, multiple regression analysis were employed in Analyzing the data. The findings showed that level of parental involvement is high,(=2.64) level of awareness of sexuality education is high(=2.68) and prevalent (SRB) is low (=1.18). All the variables jointly accounted for 7.1% variance in predicting (SRB). Sexuality education (β = .356, p<0.05) and parental involvements (β = .176, p<0.05) made positive relative influence to (SRB) among these adolescents. There was significant difference in (SRB) based on gender (t(598)= 1.422, p<.05). There was significant difference in parental involvement based on gender (t(598)= 1.893, p<.05). In light of the discoveries of the study, it was suggested that concerned stakeholders and parents should have an effective supervision of these adolescent’s (SRB), likewise adolescents in secondary schools should imbibe positive behaviours and activate same among their peers. Key Words: Sexual Risk Behaviours, Sexuality Education, Parental Involvement, Adolescent Word Count: 300enThesis