- Association des Frères-Chasseurs
- Association for Canadian Studies (ACS)
- Association of Canadian Choral Communities
- Association of Canadian Orchestras/Association des orchestres canadiens
- Association of Canadian Women Composers/Association des femmes compositeurs canadiennes
- Association of Canadian Women Composers/L'Association des femmes compositeurs canadiennes
- Universities Canada
- Associations
- Aster
- Asteroids Named After Places in Canada
- Asthma
- Astral Media
- Astrid Dora Janson
- Canadian Astronauts
- Astronomy
