A
- Scott Abbott – co-inventor of Trivial Pursuit
- Ramzi Abid – NHL hockey player
- Aliceffekt – 8bit Experimental songwriter
- Hugh Allan – financier and shipping magnate
- Sir Hugh Allan – founder of the Allan Steamship Line
- H. Montagu Allan – businessman, Hockey Hall of Fame member
- Martha Allan – founder of the Montreal Repertory Theatre
- Paul Almond – director
- Sidney Altman – Nobel Laureate in Chemistry
- René Angélil – singer, actor, husband/manager of Celine Dion
- Richard Bladworth Angus – banker
- Joel Anthony – NBA basketball player
- Gilles Archambault – novelist
- Gabriel Aubry – male model
- Melissa Auf der Maur – rock musician (Hole, The Smashing Pumpkins)
- Nick Auf der Maur – journalist, municipal politician
- Melissa Auf der Maur – rock bassist
- Michel C. Auger – journalist
- David Azrieli – real estate magnate
Read more about this topic: List Of Montreal Athletes