Objectives: Os acromiale (OA) is an uncommon pathology, with a variable prevalence rate among different populations. reporting the frequency of OA utilizing shoulder MRI of patients with shoulder pathology in our institute. Methods: Retrospective chart review to conduct our research. After obtaining our IRB approval we gathered all shoulder and upper arm MRIs from the radiology department and available in PACS. Results: The prevalence of OA was 3.32%, and the mean age of the affected patients was 50.87 years (25–81). In males there were seven OA conditions