| | Organization Name(s) | Located In |
 | Habitat for Humanity, Orillia/Lake Country Inc | Orillia |
 | Habitat for Humanity Huronia ReStore, Barrie | Barrie |
 | Habitat for Humanity North Simcoe | Midland |
 | Habitat for Humanity North Simcoe, Restore | Midland |
 | Habitat for Humanity-Huronia | Barrie |
 | Haldimand-Norfolk Information Centre | Simcoe |
 | Halton Hills Community Support and Information, Georgetown Office | Georgetown |
 | Harlos (Dr Hans E) | Elmvale |
 | Harrison Bajic Denture Clinic | Midland |
| | Harvest Ontario | Toronto |
 | Heacock (John H) | Elmvale |
 | Heacock (W. Ross) | Midland |
| | Head Lice Control | Barrie |
 | Healing Hands Massage Therapy & Wellness Centre | Elmvale |
 | Health Works Chiropractic & Wellness Centre | Midland |
 | Hearing Rehab Centre (The) | Midland |
 | Heart and Stroke Foundation of Ontario, Barrie Office | Barrie |
 | Heart Songs | Midland |
 | Helix Hearing Centre, Barrie South Location | Barrie |
 | Helping Hand Food Bank, Bradford | Bradford |
 | Helping Hand Food Bank, Christmas Assistance, Bradford | Bradford |
 | Helping Hands Soup Kitchen. Penetanguishene | Penetanguishene |
 | Helping Hands, Orillia, Community Support Services | Orillia |
 | Helt (Dr Robert) | Midland |
| | Here and Now Health Services | Penetanguishene |
 | HGR Graham Partners LLP | Midland |
 | Highview Farms, Riding School | Waubaushene |
 | Hillcrest Village Care Centre | Midland |
 | Hillcrest Village Care Centre, Rental Facilities | Midland |
 | Hillsdale Community Centre | Hillsdale |
 | Hillsdale Elementary School | Hillsdale |
 | Hillsdale Men's Fastball | Hillsdale |
 | Hillsdale Montessori School, Nursery School & Summer Day Camp | Hillsdale |
 | Hillsdale Play Group | Hillsdale |
| | Historic Military Establishment of Upper Canada/Royal Newfoundland Regiment | Penetanguishene |
| | Historical Automobile Society of Canada, Georgian Bay Region | Barrie |
| | Historical Automobile Society of Canada (HASC) | Orillia |
 | Holland Bloorview Kids Rehabilitation Hospital | Toronto |
 | Home Instead Senior Care, Barrie | Barrie |
 | Home School Co-op | Hillsdale |
| | Home Weatherization Retrofit Program | Toronto |
 | Homer Barrett Park Rink Committee | Elmvale |
 | Hospice Huronia | Penetanguishene |
 | Hospice Simcoe | Barrie |
 | Hospice Simcoe, Bereavement Walking Group | Barrie |
 | Hospice Simcoe, Residential Hospice | Barrie |
 | Hospice Simcoe, Visiting Hospice | Barrie |
| | Human Resources and Development Canada, Canada Learning Bond | Toronto |
 | Human Rights Legal Support Centre | Toronto |
 | Human Rights Tribunal | Toronto |
 | Huron Park Public School. Midland | Midland |
 | Huronia Airport | Perkinsfield |
 | Huronia Alarm and Fire Security, Midland Office | Midland |
 | Huronia Animal Control | Penetanguishene |
 | Huronia Ballroom Dance Club | Wyebridge |
 | Huronia Beekeepers Association (The) | Orillia |
 | Huronia Business Times | Barrie |
 | Huronia Centennial Elementary School. Elmvale | Elmvale |
 | Huronia Community Foundation | Midland |
| | Huronia Counselling Services | Penetanguishene |
 | Huronia Economic Alliance | Midland |
 | Huronia Family Housing Co-Operative | Midland |
| | Huronia Foundation for the Arts | Midland |
 | Huronia Handgun Club | Penetanguishene |
| | Huronia Handweavers | Simcoe County |
 | Huronia Harmonizers | Midland |
| | Huronia Hash House Harriers | Midland |
| | Huronia Korean Business Association | Barrie |
 | Huronia Massage Therapy Clinic | Midland |
 | Huronia Medical Centre Laboratory | Midland |
 | Huronia Museum and Huron-Ouendat Village | Midland |
 | Huronia Museum and Huron-Ouendat Village, Day Camp and Holiday Programs | Midland |
 | Huronia Museum and Huron-Ouendat Village. Film Series | Midland |
 | Huronia Nurse Practitioner-Led Clinic | Oro-Medonte |
 | Huronia Oral Surgery Group | Barrie |
 | Huronia Physiotherapy and Chiropractic | Midland |
 | Huronia Players | Midland |
 | Huronia Pregnancy Resource Centre | Midland |
| | Huronia Radio Control Club | Barrie |
 | Huronia Restorative Justice Project | Midland |
| | Huronia Rose Society | Barrie |
 | Huronia Soccer Club | Midland |
| | Huronia Spinners Guild | Barrie |
| | Huronia Symphony Orchestra | Barrie |
 | Huronia Trails and Greenways | Simcoe County |
 | Huronia Transition Homes | Midland |
 | Huronia Transition Homes, Athena's Sexual Assault Counselling & Advocacy Centre | Barrie |
 | Huronia Transition Homes, Choices for Children | Simcoe County |
 | Huronia Transition Homes, La Maison Rosewood Shelter | Midland |
 | Huronia Triathlon, Duathlon and Kids of Steel, Multi-Sport Canada | Penetanguishene |
 | Huronia Visually Impaired Support Group | Penetanguishene |
| | Huronia Woodland Owners Association | Simcoe County |
 | Hurons Gymnastic Club | Midland |
 | Hurons Gymnastic Club Inc., Day Camp Programs | Midland |
 | Hydro One | Toronto |