Sexual abuse (promiscuity) in tertiary institutions constitutes a sociological problem in the society today. To investigate the perceived causes of sexual abuse among female students in a selected tertiary institution in Adamawa state, a questionnaire was drawn up guided by two research questions coming from two objectives for the study. Descriptive survey design was adopted for the study and final year female students and lecturers/administrators constituted the population for the study which was two hundred respondents. Questionnaires were issued to them after which the data collected from the respondents was analyzed using descriptive statistics. The study revealed that there are certain behaviors which constitute sexual abuse among female students in the institution; also it was found that economic factors, personal factors and organizational factors are the causes of sexual abuse among female students in the tertiary institution of learning. The research recommended among others, creation of jobs for job seekers by the Government and other stakeholders; award of scholarships by both the Government and other stakeholders and enactment of laws against promoters of sexual abuse (i.e. purchasers, pimps, owners of brothels, lecturers e t c).