- Arthur Thomas Bushby
- Arthur Thomas Howe
- Arthur Watkins Crisp
- Arthur Wellesley Hughes
- Arthur William Delamont
- Artificial Heart Developed
- Artificial Intelligence (AI) in Canada
- Artificial Mini-Hearts Developed
- Artiodactyla
- Artists' Jazz Band
- Artists' Organizations
- Arts
- Arts & Crafts
- Arts and Crafts Movement in Canada
- Arts and Culture Centre
- Arts and Letters Club of Toronto
- Arts Club Theatre
- Arts Commons
- Arts, Heritage and Cultural Industries Funding
- Arviat
