Martin Brennan

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