| Organization Name(s) | Located In |
| Health Cards - Lost, Stolen,Renew, or Change of Address, Overview | Ontario |
| H.E.L.P., Highway Enforcement Legal Protection | Hanover |
| Habitat for Humanity Grey Bruce | Owen Sound |
| Habitat for Humanity ReStore. Hanover | Hanover |
| Habitat for Humanity ReStore. Owen Sound | Owen Sound |
| Haiti Earthquake Disaster | Ontario |
| Hampton Court Retirement Lodge | Southampton |
| Hanover and District Chamber of Commerce | Hanover |
| Hanover and District Hospital | Hanover |
| Hanover and District Hospital, Day Hospital Program | Hanover |
| Hanover Chiropractic | Hanover |
| Hanover Civic Theatre | Hanover |
| Hanover Columbus Centre | Hanover |
| Hanover Family Dental Centre | Hanover |
| Hanover Medical Associates | Hanover |
| Hanover Missionary Church | Hanover |
| Hanover Pharmasave | Hanover |
| Hanover Pregnancy Centre | Hanover |
| Hanover Veterinary Hospital | Hanover |
| HARC Incorporated | Hanover |
| Harness (The) | Collingwood |
| Hartman Home Support Services | Port Elgin |
| Hartwell Chiropractic | Port Elgin |
| Harvest Canada | Toronto |
| Harvest Gathering Community Church | Huron-Kinloss |
| Health and Safety Association for Government Services | Toronto |
| HealthKick | Seaforth |
| Healthy Hearts Cardiac Rehabilitation | Goderich |
| Hearing Healing Hope | Owen Sound |
| Heart and Stroke Foundation of Ontario. Grey Bruce Owen Sound Office | Owen Sound |
| Heart and Stroke Foundation of Ontario. Toronto | Toronto |
| Help The Aged (Canada). Head Office | Ottawa |
| Hepworth Baptist Church | Hepworth |
| Hepworth Central Public School | Hepworth |
| Hidden Acres Mennonite Camp and Retreat Centre | Perth East |
| Hillcrest Central School | Teeswater |
| Historic Leith Church | Meaford |
| Historic Saugeen Métis at Southampton | Southampton |
| Hoffmans Patient Transfer | South Huron |
| Holland Bloorview Kids Rehabilitation Hospital | Toronto |
| Holliday's Pharma Plus Drugmart. Durham | Durham (Village of) |
| Holy Family Chapel | Sauble Beach |
| Holy Trinity Anglican | Chesley |
| Holyrood General Store | Huron-Kinloss |
| Home and Community Support Services of Grey-Bruce, Shoreline Area | Southampton |
| Home and Community Support Services of Grey-Bruce., Owen Sound & Area | Owen Sound |
| Home and Community Support Services of Grey-Bruce. Kincardine, Day Away Program | Kincardine (Town of) |
| Home and Community Support Services of Grey-Bruce. Owen Sound & Area, Meals on Wheels/Frozen Meals on Wheels | Owen Sound |
| Home and Community Support Services of Grey-Bruce. Peninsula Area | Wiarton |
| Home and Community Support Services of Grey-Bruce. Saugeen Central Area | Walkerton |
| Home and Community Support Services of Grey-Bruce. Saugeen Central Area, Day Away Program | Hanover |
| Home and Community Support Services of Grey-Bruce. Shoreline Area, SouthPort Day Away Program | Southampton |
| Hope Air | Toronto |
| Hospital For Sick Children (The) | Toronto |
| Hospital For Sick Children (The), Adolescence Substance Abuse Outreach Program | Toronto |
| Hospital For Sick Children (The), Eating Disorder Program | Toronto |
| Houston [Ruth Anne] | Owen Sound |
| Huenemoerder (Ruth) | Hanover |
| Huron Heights Public School | Kincardine (Town of) |
| Huron-Kinloss, Township of. By-law Enforcement & Animal Control | Huron-Kinloss |
| Huron-Kinloss, Township of. Municipal Office | Ripley |
| Huron-Kinloss. Huron Landfill | Huron-Kinloss |
| Huron-Kinloss. Kinloss Landfill | Huron-Kinloss |
| Huron-Kinloss. Lucknow Fire Department | Lucknow |
| Huronia Area Aboriginal Management Board | Owen Sound |
| Huronia Med-E-Ox | Owen Sound |
| Hydro One | Toronto |