Martin Brennan
Martin Brennan may refer to:
- Martin Brennan (Irish politician), Irish medical practitioner and Fianna Fáil politician, TD from 1938 to 1948
- Martin Brennan (engineer), computer engineer who worked for Sinclair Research and Atari
- Martin A. Brennan, U.S. Representative from Illinois
- Martin Brennan (hurler), Irish retired sportsman
- Martin Stanislaus Brennan, American Roman Catholic priest and scientist
- Martin Brennan (footballer), English footballer
- Martin Brennan (character), a fictional character created by the comedian Steve Coogan