Background: Alcohol use disorders (AUDs) are the most common co-occurring disorders in people with schizophrenia. Several studies have shown that rates of alcohol use disorders were over three times higher among peoples with schizophrenia than the general population. It complicates the course, treatment and worsen prognosis of schizophrenia. In Ethiopia treatment services for AUDs are inadequate. Most people with schizophrenia have access to alcohol; especially to home brewed alcoholic beverages while the identification rate is relatively low. We hope that the result of this study will help to forecast in improving the quality of care provided for people with schizophrenia and it will serve as a baseline data in similar field of studies in this country. Objectives:-The aim of this study was to assess the prevalence of AUD and associated factors among people with schizophrenia at outpatient department of Amanuel Mental Specialized Hospital, Addis Ababa. Methods:- An institution based cross -sectional study was conducted at Amanuel Mental Specialized Hospital among people with Schizophrenia. Systematic random sampling technique was used to get a total of 423 participants of schizophrenic patients from the outpatient department of the hospital. Pre-tested semi structured questionnaire was used for interviewing the study participants. Five trained data collectors and one supervisor were involved in the data collection process. The collected data were coded, entered in to EPI-INFO software and analyzed by using SPSS version 20. The strength of association between variables assessed using crude and adjusted odds ratio by running logistic regression and the cut off point for declaring statistical significance was P- value <0.05 or 95% confidence interval which does not contain the null value. Result: A total of 406 schizophrenic patients were incorporated in this study with (96%) of response rate and 28.3% of them had Alcohol use disorders. Respondents were predominantly male [n=289 (71.2%)]. The mean age of participants was 33.96 years ± 9.90 SDs, and range from 18 to 66 years. AUD were significantly associated with male gender, single, divorce/widowed, increasing age, lower income, living alone, having medical illness, and with those who use substances. Conclusion and Recommendations: Prevalence of Alcohol use disorder was high among peoples with schizophrenia and this finding suggests that screening for risky alcohol use should be integrated into routine hospital outpatient care and further need to establish preventive measures against alcohol use disorders.