| International Assessment Consortium | 4375564 | Vancouver, BC | DissolvedBy the corporation |
| INTERNATIONAL ASSET ALLIANCE INC. | 11900030 | Brampton, ON | DissolvedFor missed filings |
| INTERNATIONAL ASSOCIATED HAIRDRESSERS (DOMINION) LIMITED | 463159 | Toronto, ON | AmalgamatedNow part of another corporation |
| INTERNATIONAL ASSOCIATED HAIRDRESSERS LTD. | 1253760 | Winnipeg, MB | AmalgamatedNow part of another corporation |
| INTERNATIONAL ASSOCIATED HAIRDRESSERS (SASK.) LIMITED | 1253751 | Regina, SK | AmalgamatedNow part of another corporation |
| International Association for Adolescent Health | 4161629 | Montreal, QC | Active |
| International Association for AI and Innovation in Education | 17459301 | Mississauga, ON | Active |
| International Association for Art and ScienceAssociation Internationale des Arts et des Sciences | 11627368 | Montreal, QC | DissolvedFor missed filings |
| International Association for Disability and Oral Health | 10047961 | London, ON | Active |
| International Association for Early Childhood Education | 10661104 | Richmond, BC | Active |
| INTERNATIONAL ASSOCIATION FOR EDUCATIONAL AND WORK EXCHANGE PROGRAMMES | 2720558 | Toronto, ON | DissolvedFor missed filings |
| International Association for Great Lakes Research (Canada) | 15384494 | Ottawa, ON | Active |
| INTERNATIONAL ASSOCIATION FOR GREAT LAKES RESEARCH (CANADA) | 4145003 | Burlington, ON | DissolvedFor missed filings |
| INTERNATIONAL ASSOCIATION FOR HUMAN VALUESASSOCIATION INTERNATIONALE POUR LES VALEURS HUMAINE | 3579581 | St-Mathieu-du-Parc, QC | Active |
| INTERNATIONAL ASSOCIATION FOR INDIVIDUALS WITH AUTISTIC SPECTRUM DISORDERSASSOCIATION INTERNATIONALE POUR INDIVIDUS AVEC TROUBLES DE SPECTRE AUTISTIQUE | 3699358 | Montreal, QC | Active |
| International Association for Mechanical and Electrical Seismic Control | 10467685 | Vancouver, BC | DissolvedFor missed filings |
| International Association for Plant Biotechnology (IAPB) | 15986206 | Saskatoon, SK | Active |
| International Association for Political Science Students | 12859220 | Montreal, QC | Active |
| International Association for Premenstrual Disorders Canada | 16548059 | Beechville, NS | Active |
| INTERNATIONAL ASSOCIATION FOR PUBLISHING EDUCATION | 2622751 | Richmond, BC | DissolvedFor missed filings |
| INTERNATIONAL ASSOCIATION FOR SUICIDE PREVENTION (CANADA) INC. | 264733 | Ottawa, ON | DissolvedEnded under the old Canada Corporations Act |
| International Association for the Management of Digital Analytics | 8725756 | Toronto, ON | Active |
| International Association for the Promotion of Moral Education | 8958866 | Surrey, BC | Active |
| INTERNATIONAL ASSOCIATION FOR THE PROMOTION OF THE RULE OF LAW | 4012917 | Clementsport, NS | DissolvedFor missed filings |
| INTERNATIONAL ASSOCIATION FOR VISION & HEALING | 4179374 | Skidegate, BC | DissolvedFor missed filings |
| International Association of Acupuncture & Moxibustion Manipulative Techniques | 4194225 | Toronto, ON | Active |
| INTERNATIONAL ASSOCIATION OF ADULTS AGAINST DRUNK DRIVING | 2249791 | Dorval, QC | DissolvedFor missed filings |
| International Association of Aesthetic Medicine | 13862542 | Thornhill, ON | Active |
| INTERNATIONAL ASSOCIATION OF AESTHETICS CANADA INC. | 3798381 | North York, ON | DissolvedFor missed filings |
| International Association of Agarwood | 12066181 | Richmond, BC | DissolvedFor missed filings |
| International Association of Airport Executives CanadaConseil International Des Directeurs D'Aeroport Du Canada | 4290038 | Peterborough, ON | Active |
| International Association of Atheists | 12516829 | South Surrey, BC | DissolvedFor missed filings |
| International Association of Bioethics | 15773300 | Toronto, ON | Active |
| International Association of BIPOC Winemakers | 15310610 | Lasalle, ON | Active |
| INTERNATIONAL ASSOCIATION OF CANINE PEST INSPECTORS | 7796200 | Thornhill, ON | DissolvedFor missed filings |
| International Association of Career Colleges (IACC) Corp. | 16172440 | Hannon, ON | Active |
| INTERNATIONAL ASSOCIATION OF CATHOLIC BIOETHICS | 9734589 | Ottawa, ON | Active |
| INTERNATIONAL ASSOCIATION OF CHILDREN'S FUNDS OF NORTH AMERICA | 2529823 | Toronto, ON | DissolvedEnded under the old Canada Corporations Act |
| International Association of Chinese Genealogy | 8958181 | New Westminster, BC | DissolvedFor missed filings |
| INTERNATIONAL ASSOCIATION OF DISASTER MANAGEMENT AMERICAS | 18127638 | Toronto, ON | Active |
| INTERNATIONAL ASSOCIATION OF DOWSERS | 4156269 | Vancouver, BC | DissolvedEnded under the old Canada Corporations Act |
| INTERNATIONAL ASSOCIATION OF DRUG TREATMENT COURTS | 8484597 | Toronto, ON | DissolvedBy the corporation |
| INTERNATIONAL ASSOCIATION OF ECONOMICS, FINANCE AND SUSTAINABLE BUSINESS (IAEFSB)ASSOCIATION INTERNATIONALE D'ÉCONOMIES, DE FINANCES ET D'ENTREPRISES DURABLES (AIEFED) | 8970602 | Montreal, QC | DissolvedFor missed filings |
| International Association of Embodied Intelligence | 18246530 | North York, ON | Active |
| INTERNATIONAL ASSOCIATION OF ENVIRONMENTAL TESTING LABORATORIES CANADA | 2914476 | Toronto, ON | DissolvedFor missed filings |
| International Association of Executive Directors Inc. | 7700393 | Toronto, ON | Active |
| (INTERNATIONAL) ASSOCIATION OF FIRE CHIEFS FOUNDATION (CANADIAN) | 912743 | Kitchener, ON | DissolvedFor missed filings |
| International Association of Fish Inspectors Inc. | 3592910 | Ottawa, ON | Active |
| International Association of Future Aviators | 11595849 | Windsor, ON | DissolvedFor missed filings |
| International Association of Healthcare Textile Management | 8223726 | Ottawa, ON | Active |