- Atelier TAG
- Athabasca
- Athabasca Landing
- Athabasca Landing Trail
- Athabasca Pass
- Athabasca River
- Athabasca University
- Atheism and Agnosticism
- Canadian Athletes
- Athol Murray College of Notre Dame
- Atikokan
- Atlantic Campaign of the War of 1812
- Atlantic Canadian Composers' Association/Association des Compositeurs Canadiens de l'Atlantique
- Atlantic City
- Atlantic Ocean and Canada
