- Association of Canadian Women Composers/Association des femmes compositeurs canadiennes
- Association of Canadian Women Composers/L'Association des femmes compositeurs canadiennes
- Association of Universities and Colleges of Canada
- Associations
- Aster
- Asteroids Named After Places in Canada
- Asthma
- Astral Media
- Astrid Dora Janson
- Canadian Astronauts
- Astronomy
- Astrophysics
- Asylum Seekers
- Aszure Barton
- Atanarjuat (The Fast Runner)
