Abdul Matlib Mazumdar (Bengali: আব্দুল মতলিব মজুমদার; 1890–1980) was an Indian freedom fighter and political leader based in undivided Assam State. In 1946, when India was still under British rule, he became an MLA and also Cabinet Minister of Assam. He was one of the prominent Muslim leaders of eastern India to support Hindu-Muslim unity, opposing the partition of India on communal lines. Mazumdar along with Fakhruddin Ali Ahmed (who later became the 5th President of India) became the most prominent Muslim opponents of the demand for a separate Muslim state of Pakistan, especially in the eastern part of the country.