Aim: To estimate the Prevalence of Obsessive-Compulsive Disorder (O.C.D.) among individuals in the City of Mosul, Iraq. As well as to identify the severity of the problem and the factors that are associated with O.C.D.

Methods: In the present study, a cross-sectional study design was conducted. ninety-two patients were collected purposively for a period of twelve months from outpatients’ clinics in Al Salam and Ibn Sina Teaching Hospitals in the City of Mosul -Iraq. Y Y-BOCS scale was used for evaluation of the patients as well as an information sheet was prepared to collect the socio-demographic characteristics of them. The data were analyzed by S.P.S.S. 25

Results: Most of the participants were young adults (25.16 ± 2.8 years) and single females with a university level of education who are initially from Ninevah governorate. The Prevalence of O.C.D. symptoms was 2.3%. When the association between O.C.D. and different demographic characters was tested, a significant relationship between O.C.D. and age, gender, and family history factors.

Conclusion: This research analyzed the obsessive and compulsive disorders of a group of patients in terms of socio-demographic features.

Keywords: Prevalence, Obsessive-Compulsive Disorder, Iraq