Syed Badrudduja (Bengali: সৈয়দ বদরুদ্দোজা; 4 January 1900 – 18 November 1974) was an Indian-Bengali politician, parliamentarian, and activist. He was a member of West Bengal Legislative Assembly, member of Indian parliament Lok Sabha and the Mayor of Calcutta. He was involved with the anti-colonials movements like Khilafat Movement and Civil Disobedience Movement, and was an advocate of Huseyn Shaheed Suhrawardy's United Bengal proposal.