Syed Tahir Hussain Mashhadi (; 26 July 1942 – 9 July 2022) was a Pakistani soldier and a politician (a member of the Senate of Pakistan from 2003 to 2006).
Tahir Mashhadi joined the Pakistan Army in 1970 during the war with India and was commissioned as a second lieutenant in 1971, graduating from the Pakistan Military Academy.
During the Indo-Pakistani War of 1971, Mashhadi was stationed in then East Pakistan, which saw some heavy air attacks. At the end of war, Mashhadi was taken as a prisoner of war and repatriated in 1974.
He was a member of the Pakistan Peoples Party and a former senator of the Muttahida Qaumi Movement.
Tahir Hussain Mashhadi died on 9 July 2022.