| International Society for Krishna Consciousness (Calgary) | 9522913 | Calgary, AB | Active |
| INTERNATIONAL SOCIETY FOR KRISHNA CONSCIOUSNESS (CANADA)LA SOCIETE INTERNATIONALE POUR LA CONSCIENCE DE KRISHNA (CANADA) | 464066 | Montreal, QC | Active |
| International Society for Krishna Consciousness (Edmonton) | 9522824 | Calgary, AB | Active |
| International Society for Krishna Consciousness (ISKCON Angus) | 17113820 | Angus, ON | Active |
| International Society for Krishna Consciousness (ISKCON Barrie) | 14242033 | Toronto, ON | Active |
| International Society for Krishna Consciousness ( ISKCON Burlington) | 13143341 | Burlington, ON | Active |
| International Society for Krishna Consciousness (ISKCON Durham) | 16871968 | Whitby, ON | Active |
| International Society for Krishna Consciousness (ISKCON Fredericton) | 14116615 | Fredericton, NB | Active |
| International Society for Krishna Consciousness (ISKCON Grande Prairie) | 17781911 | Grande Prairie, AB | Active |
| International Society for Krishna Consciousness (ISKCON Milton) | 10855995 | Toronto, ON | Active |
| International Society for Krishna Consciousness (ISKCON Mississauga) | 16221734 | Mississauga, ON | Active |
| International Society for Krishna Consciousness (ISKCON Muskoka) | 12647575 | Bracebridge, ON | Active |
| International Society for Krishna Consciousness (ISKCON Niagara) | 11812793 | Niagara Falls, ON | Active |
| International Society for Krishna Consciousness (ISKCON Red Deer) | 14901461 | Red Deer, AB | Active |
| International Society for Krishna Consciousness (ISKCON Russian-Speaking Toronto) | 12845385 | Toronto, ON | Active |
| International Society for Krishna Consciousness (ISKCON Saranagati) | 13539261 | Ashcroft, BC | Active |
| International Society for Krishna Consciousness (ISKCON Stouffville) | 14848110 | Whitchurch-Stouffville, ON | Active |
| International Society for Krishna Consciousness (ISKCON Waterloo) | 16949916 | Guelph, ON | Active |
| International Society for Krishna Consciousness (ISKCON Windsor) | 17139039 | Amherstburg, ON | Active |
| International Society for Krishna Consciousness (ISKCON Zone 1 - The North) | 17109512 | Winnipeg, MB | Active |
| INTERNATIONAL SOCIETY FOR KRISHNA CONSCIOUSNESS OAKVILLE | 12197553 | Oakville, ON | Active |
| INTERNATIONAL SOCIETY FOR KRISHNA CONSCIOUSNESS (ONTARIO) | 64751 | Toronto, ON | DissolvedFor missed filings |
| INTERNATIONAL SOCIETY FOR KRISHNA CONSCIOUSNESS (OUTAOUAIS REGION) INC.L'ASSOCIATION INTERNATIONALE POUR LA CONSCIENCE DE KRISHNA (OUTAOUAIS) INC. | 661171 | Ottawa, ON | Active |
| INTERNATIONAL SOCIETY FOR MESOPOROUS MOLECULAR SIEVES | 3712991 | Ste-Foy, QC | DissolvedFor missed filings |
| International Society for Music Information Retrieval | 4483723 | Montreal, QC | Active |
| International Society for Neurodegenerative Diseases | 11562924 | Toronto, ON | Active |
| INTERNATIONAL SOCIETY FOR RESEARCH IN PALMISTRY | 184756 | Chénéville, QC | DissolvedFor missed filings |
| INTERNATIONAL SOCIETY FOR SOUTH ASIAN DEVELOPMENTSOCIÉTÉ INTERNATIONALE POUR LE DÉVELOPPEMENT DE L'ASIE DU SUD | 3508943 | Ottawa, ON | DissolvedFor missed filings |
| INTERNATIONAL SOCIETY FOR THE STUDY OF HYPERTENSION IN PREGNANCY (CANADA) | 2104903 | Fleurimont, QC | DissolvedFor missed filings |
| International Society for the Study of Individual Differences | 4292812 | London, ON | Active |
| International Society for TractographySociété internationale de Tractographie | 15501008 | Magog, QC | Active |
| International Society for World Philosophy | 13088774 | Toronto, ON | Active |
| International Society of Addiction Medicine Inc. | 3832562 | Calgary, AB | Active |
| INTERNATIONAL SOCIETY OF ARBORICULTURE - ONTARIOASSOCIATION INTERNATIONALE D'ARBORICULTURE - ONTARIO | 466026 | Milton, ON | Active |
| INTERNATIONAL SOCIETY OF ASCENSIONSOCIÉTÉ INTERNATIONALE D'ASCENSION | 4163729 | Salmon Arm, BC | DissolvedFor missed filings |
| INTERNATIONAL SOCIETY OF AUTOIMMUNITYSOCIETE INTERNATIONALE DES MALADIES AUTOIMMUNES | 2337169 | London, ON | DissolvedEnded under the old Canada Corporations Act |
| International Society of Bioinformatics | 13129705 | Scarborough, ON | Active |
| INTERNATIONAL SOCIETY OF BLOOD TRANSFUSION 2002 INC. | 3832988 | Vancouver, BC | DissolvedFor missed filings |
| International Society of Dental Regulators | 9075089 | Toronto, ON | DissolvedBy the corporation |
| International Society of Digital Legacy ProfessionalsLa Societe Internationale des Professionnels de Patrimoine Numerique | 8131104 | Toronto, ON | Active |
| INTERNATIONAL SOCIETY OF DIPLOMATSSOCIETE INTERNATIONALE DES DIPLOMATES | 13205851 | Etobicoke, ON | Active |
| INTERNATIONAL SOCIETY OF DIVINE LOVE CANADA INC | 2478391 | Mississauga, ON | DissolvedFor missed filings |
| International Society Of Emergency First Care | 8486735 | Surrey, BC | Active |
| International Society of Environmental Law (ISOEL) | 11443844 | Toronto, ON | Active |
| INTERNATIONAL SOCIETY OF EXPLOSIVE EXPERTS | 9607099 | Red Deer, AB | Active |
| INTERNATIONAL SOCIETY OF HEMATOLOGY ANNUAL MEETING 2018 INC. | 9285679 | Ottawa, ON | DissolvedFor missed filings |
| INTERNATIONAL SOCIETY OF HEMATOLOGY YEAR 2000 MEETING INC. | 3340066 | Ottawa, ON | DissolvedFor missed filings |
| International Society of Measurement, Management and Maintenance | 10265659 | Ottawa, ON | Active |
| International Society of Medical Writers and Editors | 17613199 | London, ON | Active |
| International Society of Oncology Pharmacy Practitioners | 9510869 | Vancouver, BC | Active |