Sexual assault is a common social disorder among students in our tertiary institutions. This study ascertains the extent and effect of sexual assault among Nigerian students. Two hundred and Sixty Eight structured questionnaires were distributed to randomly selected students in 4 tertiary institutions, information on socio demography, sexual history and consequences of their exposure were obtained for analysis and interpretation. Thirty seven (13.8%) of the respondents were sexually assaulted as a student and 19 (7.1%) were assaulted by their lecturers and fellow students, Younger age at coitarche, history of forced coitarche, marriage, coitarche with relations and unknown persons, significantly influenced subsequent risks of sexual assault. Improve security, moral behaviours enforcing dress code and stiffer penalties were suggested ways to prevent sexual assault among the students. Sexual assault is still a common finding in our institutions; effort should be made by all stake holders to prevent this social embarrassment.