The study looked at the efficiency of 36 commercial banks in Bangladesh from 2011 to 2016. They used a method called Data Envelop Analysis to analyze the data. The results showed that most banks were inefficient in terms of technical, allocative, and scale efficiency during this period. Only six banks were found to be efficient overall. No single bank was efficient in all categories for the entire study period. The study provides insights and suggestions for bank managers and policymakers to improve efficiency and stability in the banking sector of Bangladesh.