| H.O.P.E. (Homes of Priority Education), Virtual only | Stratford |
| Habitat for Humanity Heartland Ontario Stratford ReStore, ReStore | Stratford |
| Happy Valley Family Health Team, Traditional Centre for Wellness, St Marys Medical Clinic | St Marys |
| Head to Toe Health - Advanced Nursing Foot Care and Reflexology, Mobile Service | Listowel |
| Heartfelt Music & Productions | St Marys |
| Heinbuch Wildlife Control, No Physical Address | Perth East |
| Help A Girl Out | Brampton |
| Help Call, Personal Emergency Response Services | Orangeville |
| Helpline, Sudbury, Personal Emergency Response System | Greater Sudbury |
| Hemophilia Ontario | Scarborough North |
| Hermione Presents Interdisciplinary Arts Productions Inc, Stratford - various locations, SpringWorks: indie theatre & arts festivals | Stratford |
| Hidden Acres Mennonite Camp and Retreat Centre | New Hamburg |
| Hidden Acres Mennonite Camp and Retreat Centre, Summer Camp Programs | Perth County |
| HIV & AIDS Legal Clinic Ontario (HALCO) | Toronto |
| Hope+Me - Mood Disorders Association of Ontario, Mood Disorders Association of Ontario | Toronto Downtown |
| Horizon ProResp Inc | Stratford |
| Hospital for Sick Children, Adolescent Medicine | Toronto |
| Hubbard Pharmacy | St Marys |
| Human Rights Legal Support Centre | Toronto |
| Human Rights Tribunal of Ontario | Toronto |
| Humana Community Services, Exeter - Huron Street Residence, Hartland Program | South Huron |
| Huron Community Family Health Team, Seaforth | Huron East |
| Huron Country Playhouse, Huron Country Playhouse & Playhouse II | Grand Bend |
| Huron County Food Bank Distribution Centre | South Huron |
| Huron County Library, Kirkton Branch, Library Services | South Huron |
| Huron County. Municipal Office, Emergency Management, Clinton - Beech St | Central Huron |
| Huron County. Municipal Office, Huron County Tourism | Goderich |
| Huron Domestic Assault Review Team | Huron County |
| Huron Emergency Management | Huron County |
| Huron Health System, South Huron Hospital | South Huron |
| Huron Health System - Alexandra Marine and General Hospital, Goderich - Huron Rd, Huron Perth Clinical Intensive Case Management | Goderich |
| Huron Hospice, Huron Hospice Bender House | Central Huron |
| Huron Midwives | Blyth |
| Huron Perth & Area Ontario Health Team, Bluewater Area Family Health Team - Zurich | Bluewater |
| Huron Perth & Area Ontario Health Team, Listowel-Wingham and Area Family Health Team - Listowel | North Perth |
| Huron Perth & Area Ontario Health Team, Listowel-Wingham and Area Family Health Team - Wingham | North Huron |
| Huron Perth & Area Ontario Health Team, Maitland Valley Medical Centre - Goderich | Goderich |
| Huron Perth & Area Ontario Health Team, South Huron Medical Centre and Walk-In Clinic - Exeter | South Huron |
| Huron Perth & Area Ontario Health Team, Stratford Family Health Team | Stratford |
| Huron Perth Association of REALTORS® | Stratford |
| Huron Perth Cattle Feeders Association | Huron East |
| Huron Perth Community Legal Clinic, Goderich | Goderich |
| Huron Perth Community Legal Clinic, Stratford | Stratford |
| Huron Perth Community Support Services Network, Clinton | Central Huron |
| Huron Perth District Women's Institute, Perth and Huron County - Mailing Address | Listowel |
| Huron Perth Healthcare Alliance, Community Stroke Rehabilitation Team - Moving Forward With Stroke Program, Avondale United Church | Stratford |
| Huron Perth Healthcare Alliance, Listowel Wingham Outpatient Building, Listowel Mental Health Outpatient Services | North Perth |
| Huron Perth Healthcare Alliance, Volunteer Services | Stratford |
| Huron Perth Healthcare Alliance, Mental Health Services - Huron Perth Assertive Community Treatment Team, Seaforth - 28 Centennial Dr | Huron East |
| Huron Perth Healthcare Alliance, Mental Health Services - Huron Perth Seniors Mental Health Program, Seaforth - 28 Centennial Dr | Huron East |
| Huron Perth Healthcare Alliance, Ontario Breast Screening Program, Stratford General Hospital | Stratford |
| Huron Perth Healthcare Alliance, Seaforth - 28 Centennial Dr, Community Treatment Orders Program | Huron East |
| Huron Perth Healthcare Alliance, Seaforth - 28 Centennial Dr, Mental Health Services - Huron Perth Helpline and Crisis Response Team, Seaforth - 28 Centennial Dr | Huron East |
| Huron Perth Healthcare Alliance, Seaforth - 28 Centennial Dr, Mental Health Services | Huron East |
| Huron Perth Healthcare Alliance, Seaforth - 28 Centennial Dr, OTN Primary Care Nurse Practitioners | Huron East |
| Huron Perth Healthcare Alliance, Seaforth - 28 Centennial Dr, Prevention and Early Intervention Program for Psychoses | Huron East |
| Huron Perth Healthcare Alliance, Seaforth Community Hospital | Huron East |
| Huron Perth Healthcare Alliance, SGH - Special Services Unit - Stratford, Eating Disorders Outreach Program | Stratford |
| Huron Perth Healthcare Alliance, SGH - Special Services Unit - Stratford, Mental Health Services - Huron Perth Helpline and Crisis Response Team, SGH - Special Services Unit - Stratford | Stratford |
| Huron Perth Healthcare Alliance, SGH - Special Services Unit - Stratford, Psychiatric Day & Evening Program - Outpatient Individual & Group Counselling | Stratford |
| Huron Perth Healthcare Alliance, SGH - Special Services Unit - Stratford, Sexual Abuse Treatment Program | Stratford |
| Huron Perth Healthcare Alliance, St Marys Memorial Hospital | St Marys |
| Huron Perth Healthcare Alliance, Stratford Aphasia Group, Avondale United Church | Stratford |
| Huron Perth Healthcare Alliance, Stratford General Hospital, Breastfeeding Clinic, Stratford General Hospital | Stratford |
| Huron Perth Healthcare Alliance, Stratford General Hospital, Huron Perth Diabetes Program | Stratford |
| Huron Perth Healthcare Alliance, Stratford General Hospital | Stratford |
| Huron Perth Junior Farmers, No Physical Address | |
| Huron Perth Lakers "AAA" Hockey Association | Stratford |
| Huron Perth Public Health, Clinton - London Rd, Food Safety | Central Huron |
| Huron Perth Public Health, Clinton - London Rd, Rabies Control | Central Huron |
| Huron Perth Public Health, Clinton - London Rd, Safe Beach Water | Central Huron |
| Huron Perth Public Health, Clinton - London Rd, Safe Drinking Water | Central Huron |
| Huron Perth Public Health, Clinton - London Rd, School Health - Huron County | Central Huron |
| Huron Perth Public Health, Healthy Babies, Healthy Children | Stratford |
| Huron Perth Public Health, Mailing Address - Stratford, Volunteer Opportunities | Stratford |
| Huron Perth Public Health, Oral Health, Listowel - 161 Inkerman St. W | North Perth |
| Huron Perth Public Health, Oral Health, Stratford - West Gore St. | Stratford |
| Huron Perth Public Health, Pregnancy and Prenatal Classes, Online/Web Service | |
| Huron Perth Public Health, Sexual Health Clinics - Perth County, Listowel - 161 Inkerman St. W | North Perth |
| Huron Perth Public Health, Sexual Health Clinics - Perth County, Stratford - Downie St | Stratford |
| Huron Perth Public Health, Stratford - West Gore St., Huron Perth Public Health - Stratford Office | Stratford |
| Huron Perth Public Health, Stratford - West Gore St., School Health - Perth County | Stratford |
| Huron Perth Public Health, Breastfeeding Supports | Stratford |
| Huron Perth Quilters Guild | West Perth |
| Huron Waves Music Festival | |
| Huron-Perth Catholic District School Board, Catholic Education Centre, Dublin | West Perth |
| Huron-Perth Catholic District School Board, Ontario Youth Apprenticeship Program | Stratford |
| Huron-Perth Centre for Children and Youth, Clinton | Central Huron |
| Huron-Perth Centre for Children and Youth, Listowel | North Perth |
| Huron-Perth Centre for Children and Youth, Stratford | Stratford |
| Huron-Perth Children's Aid Society, Goderich - 413 MacEwan St, Goderich Office | Goderich |
| Huron-Perth Children's Aid Society, Parenting Support & Education, Stratford - 639 Lorne Ave E | Stratford |
| Huron-Perth Children's Aid Society, Stratford - 639 Lorne Ave E, Head Office | Stratford |
| Huron-Perth Women for the Support of Agriculture, Women for the Support of Agriculture - Huron / Perth District | West Perth |
| Hydro One | Toronto |
| Hydrocephalus Canada | Etobicoke Central |