| Habitat for Humanity, Orillia, Habitat pour l'humanité | Orillia |
| Habitat for Humanity, Orillia, Restore | Orillia |
| Habitat for Humanity Huronia | Barrie |
| Habitat for Humanity Huronia, Alliston, ReStore, Alliston | New Tecumseth |
| Habitat for Humanity Huronia, Barrie, Habitat pour l'humanité Huronia | Barrie |
| Habitat for Humanity Huronia, Barrie, ReStore, Barrie | Barrie |
| Habitat for Humanity Ontario Gateway North, Bracebridge ReStore, Bracebridge | Bracebridge |
| Habitat for Humanity Ontario Gateway North, Huntsville, Huntsville Restore | Huntsville |
| Habitat pour l'humanité Ontario Gateway North | Midland |
| Habitat pour l'humanité Ontario Gateway North, Midland ReStore, Simcoe Nord | Midland |
| Habitat pour l'humanité Ontario Gateway North, Simcoe Nord, Succursale Simcoe Nord | Midland |
| Habitat pour l'humanité South Georgian Bay | Collingwood |
| Habitat pour l'humanité South Georgian Bay, Habitat pour l'humanity South Georgian Bay | Collingwood |
| Habitat pour l'humanité South Georgian Bay, ReStore | Collingwood |
| Hair Prosthesis Centre, Centre de prothèses capillaires | Barrie |
| Hammond Transportation | Bracebridge |
| Hammond Transportation, Oro-Medonte, Hammond Transportation, Oro-Medonte | Hawkestone |
| Hammond Transportation, Parry Sound, Hammond Transportation, Parry Sound | Parry Sound |
| Hands TheFamilyHelpNetwork.ca, Child Development | Bracebridge |
| Handy Man Service, Mobile Service, Service de bricoleur | Creemore |
| Hank the Home Specialist | Clearview (Comté Simcoe) |
| Happy at Home Support Services, Orillia, Service de soutien à domicile Happy at Home | Orillia |
| Happy at Home Support Services, Services infirmiers spécialisés en soins des pieds | Orillia |
| Happy at Home Support Services, Transport, Orillia, Orillia | Orillia |
| Harmony North Chorus, chœur Harmony North | Collingwood |
| Harrison-Cragg (Sarah), Travailleuse sociale | Collingwood |
| Harvest Bible Chapel, Barrie | Barrie |
| Havre de la découverte | Penetanguishene |
| Hawkestone Singers | Hawkestone |
| Head Lice Hunters, Service mobile | Innisfil |
| Healthy Babies Healthy Families, Collingwood | Collingwood |
| Healthy Community Network Wasaga Beach | Wasaga Beach |
| Hearing Life, Wasaga Beach | Wasaga Beach |
| Hearing Life Canada, Hearing Sciences Audiology and Hearing Aid Centre, Centre d'audiologie et de prothèse auditive des sciences de l'audition | Collingwood |
| Hearing Rehab Centre (The) | Midland |
| HearingLife, Collingwood | Collingwood |
| Heart and Stroke [Central East], Bureau de Barrie, Maladies du coeur et AVC | Toronto |
| Heart to Home Meals | Collingwood |
| Heartfelt Home Care, Midland, Services de soins à domicile | Midland |
| HeartFlame, Thérapie individuelle et de couple | Collingwood |
| Heathers Home Healthcare, Service de santé à domicile Heathers Home Healthcare | Bracebridge |
| Helix Hearing Care, Orillia, Soins auditifs Helix | Orillia |
| Help is Here, Collingwood - Mailing Address | Collingwood |
| Helping Hand Food Bank, Banque alimentaire Helping Hand | Bradford West Gwillimbury |
| Helping Hand New To You | Essa |
| Helping Hands | Orillia |
| Helping Hands, Homemaking Services | Orillia |
| Helping Hands, Popote roulante | Orillia |
| Helping Hands, Programme de lits de transition | Orillia |
| Helping Hands, Réconfort téléphonique | Orillia |
| Helping Hands, Services de vie assistée | Orillia |
| Helping Hands, Transport | Orillia |
| Helping Hands for the Homeless | Barrie |
| Helping Hands Home Health Care, Collingwood - Mailing Address, Soins à domicile Helping Hands | Collingwood |
| Hémophilie Ontario | Scarborough Nord |
| Henninger Speech and Language Centre, Centre d'orthophonie Henninger | Barrie |
| Heritage Baptist Church, Barrie, église baptiste Heritage | Barrie |
| Heritage Barrie | Barrie |
| Heritage Christian Academy | Barrie |
| Highlands Nordic, Duntroon, Club de Ski Highlands Trailblazers | |
| Hikewood Therapy Services, Services de thérapie Hikewood | Springwater |
| Hillcrest Village Care Centre, Centre de soins Hillcrest Village | Midland |
| Hi-Mark Occupational Skills Training Centre, Centre de formation professionnelle Hi-Mark | Oro-Medonte |
| Historic Military Establishment of Upper Canada / Royal Newfoundland Regiment | Penetanguishene |
| Historical Automobile Society of Canada (HASC), Orillia - Adresse postale, Région de la Huronie | Orillia |
| Hockey de zone AAA des Colts de Barrie | Barrie |
| Holland Bloorview Kids Rehabilitation Hospital, Ligne d'information Warmline, Toronto - Ligne téléphonique seulement, Ligne d'information Warmline | Toronto |
| Holly Chiropractic and Wellness, Chiropratique et bien-être Holly | Barrie |
| Holt, Tamara | Collingwood |
| Holy Cross - St Nektarios Greek Orthodox Community, Holy Cross - Communauté grecque orthodoxe St Nektarios | Barrie |
| Holy Martyrs of Japan Roman Catholic Church, Église catholique romaine Holy Martyrs of Japan | Bradford West Gwillimbury |
| Holy Martyrs of Japan Roman Catholic Church, St. Vincent de Paul | Bradford West Gwillimbury |
| Home Care Assistance, Aide aux soins à domicile | Barrie |
| Home Horizon, Collingwood, Barbara Weider House | Collingwood |
| Home Instead, Barrie | Barrie |
| Hope City Church | Barrie |
| Hope City Church, Café Higher Grounds | Barrie |
| Hope City Church, Hope Centre | Barrie |
| Hope Community Christian Church | Severn |
| Hope Counselling and Life Coaching Services, Services de counselling et de mentorat spécialisé Hope | Bracebridge |
| Hôpital des Tortues de Georgian Bay | Oro-Medonte |
| Hôpital général de la baie Georgienne, Dépôt de fournitures pour bébés, Midland | Midland |
| Hôpital général de la baie Georgienne, Fondation de l'Hôpital général de la baie Georgienne, Midland | Midland |
| Hôpital général de la baie Georgienne, Midland, Hôpital général de la baie Georgienne, Midland | Midland |
| Hôpital général de la baie Georgienne, Midland, Service d'urgence | Midland |
| Hôpital général de la baie Georgienne, Penetanguishene, Hôpital général de la baie Georgienne, Penetanguishene | Penetanguishene |
| Hôpital général de la baie Georgienne, Volunteer Association, Midland | Midland |
| Hospice Georgian Triangle, Soins palliatifs Hospice Georgian Triangle | Collingwood |
| Hospice Huronia, Tomkins House | Penetanguishene |
| Hospice Mariposa House | Severn |
| Hospice Orillia, Soins palliatifs Orillia | Orillia |
| Hospice Simcoe | Barrie |
| Hospice Simcoe, Hospice résidentiel | Barrie |
| Hospice Simcoe | Barrie |
| Hospice Simcoe, Hospice visitant | Barrie |
| Hospice Simcoe, Programme en matière de deuil | Barrie |
| Hummingbird Montessori School, École Hummingbird Montessori School | Clearview (Comté Simcoe) |
| Huronia Alarm and Fire Security, Collingwood Office, Alarme et sécurité incendie Huronia, Collingwood Office | Collingwood |
| Huronia Alarm and Fire Security, Midland Office, Alarme et sécurité incendie Huronia, Midland Office | Midland |
| Huronia Animal Control, Contrôle animalier Huronia | Tiny |
| Huronia Family Housing Co-Operative | Midland |
| Huronia Fur and Feather Breeders Association | Oro-Medonte |
| Huronia Handgun Club, Club des armes de poing Huronia | Penetanguishene |
| Huronia Handweavers, Tisseurs à main Huronia | Springwater |
| Huronia Harmonizers | Midland |
| Huronia Land Conservancy | Midland |
| Huronia Nurse Practitioner-Led Clinic | Oro-Medonte |
| Huronia Players, Huronia Players - MCC | Midland |
| Huronia Pregnancy Resource Centre, Centre de ressources en matière de grossesse d'Huronia | Midland |
| Huronia Radio Control Club | Barrie |
| Huronia Rose Society, Société des Roses Huronia | Barrie |
| Huronia Seniors Volunteer Care Team (HSVCT), Huronia Seniors Volunteer Care Team, Wheels 4 Wheels | Midland |
| Huronia Soccer Club, club de soccer Huronia | Midland |
| Huronia Stallions Football Club, Mailing Address | Springwater |
| Huronia Transition Homes | Midland |
| Huronia Transition Homes, Centre de counselling et de défense en matière d'agression sexuelle Athena | Barrie |
| Huronia Transition Homes, Choices for Children | Midland |
| Huronia Transition Homes, Dépôt d'urgence d'articles pour bébés de Midland | Midland |
| Huronia Transition Homes, La Maison Rosewood Shelter | Midland |
| Huronia Transition Homes, Operation Grow | Midland |
| Huronia Urgent Care Clinic, Clinique de soins d'urgence Huronia | Barrie |
| Hurons Gymnastic Club | Midland |
| Hurons Gymnastic Club, Programmes des camps de jour | Midland |
| Hydrocephalus Canada | Etobicoke Centre |
| Hygiène dentaire Blue Horizon | Collingwood |