Mohammad Tahir was an Indian politician and lawyer who served as a member of parliament three times in 1957, 1962, 1971, member of Constituent Assembly from 1946 to 50 and member of Bihar Legislative Assembly while representing Kishanganj and Purnia Lok Sabha constituency and Purnia assembly constituency. A member of the Indian National Congress, he also served member of Constituent Assembly from 1946 to 50 and was formerly associated with the All-India Muslim League.