ABSTRACT Objective: To determine the prevalence of postpartum psychiatric disorders in young mothers using a brief structured psychiatric interview, the Mini International Neuropsychiatric Interview (MINI). Study Design: A cross-sectional study. Place and Duration of Study: The Primary Health Care Centres (PHCCs) in Al-Ahsa region, Saudi Arabia, during the period 2008 to 2009. Methodology: Young primigravid mothers (in their teen age) were interviewed using MINI. Psychiatric morbidity was analyzed in relation to the different sociodemographic, psychiatric and obstetric characteristics. The distribution and frequency of the MINI subscales were presented in number and percentage. To quantify the risk, Univariate analysis was employed with reporting of crude Odds Ratio (OR) and 95% Confidence Intervals (CI); p-value of < 0.05 was considered significant. Results: The prevalence of psychiatric disorders was 22.6% with preponderance of anxiety disorders due to increased prevalence of generalized anxiety disorder and social phobia. Postpartum anxiety disorders were significantly associated with urban residency, poor husband support, past history of psychiatric illness, anemia, caesarean mode of delivery and female baby gender. Conclusion: These results highlighted importance of addressing screening for psychiatric morbidity particularly anxiety disorders in the implementation of perinatal care for the pregnant Saudi adolescents.