SM Al Mamun is an Awami League politician, and a former member of the Bangladesh Parliament for Chittagong-4. He has been charged by the International Crimes Tribunal in connection with the July massacre during the 2024 Student-People's uprising.
Mamun served as the Upazila Chairman of Sitakunda before he was nominated by the Awami League for the 2024 Bangladeshi general election. He occupied a seat in the Jatiya Sangsad as a member of parliament until the July revolution.