Abstract: The study investigated parental education, religious background and the sexual behaviour of female students in universities south west Nigeria. The study was a descriptive design of the survey type. A questionnaire designed by the researcher was used to collect data from a sample of 1000 female students that were selected using multi-stage sampling technique as well as simple random sampling of universities in south west Nigeria. Two null hypotheses were postulated and test at 0.05 level of significance using Pearson Product Moment Correlation Analysis. The finding revealed that parental education and religious background of female students had no significant relationship with their sexual behaviour. Based on the findings, it was recommended that parents whether educated or not were to train their children the proper way in all they would be doing.