Thomas Ballantyne Martin (13 November 1901 – 28 January 1995) was a British politician, stockbroker and journalist.
After an early career as a private secretary he was unexpectedly elected as a Conservative Member of Parliament in Blaydon, a traditionally extremely secure Labour constituency.
After standing up in Parliament for the local mining industry he opted out of defending his seat, and could not find election elsewhere; he then became a political journalist.
After wartime service in intelligence, he supported Winston Churchill's attempt to bring European unity and then became a stockbroker.
A very clubbable man, he attracted interest in the 1990s as a rare survivor of the pre-Second World War Parliament.