| Jack.org, Halton Chapters | Halton Region |
| Jack.org, BeThere.org - Online Mental Health Supports | Toronto |
| Jack.org, COVID-19 Youth Mental Health Resource Hub | Toronto |
| Jake's House | Mississauga |
| Jake's House for Children with Autism | Mississauga |
| James Snow Clinic, Family Practice and Walk-in | Milton |
| Jennifer Ashleigh Children's Charity | Uxbridge |
| Job Centre (The) | Oakville |
| Job Centre (The), Oakville - Head Office, Integrated Employment Services | Oakville |
| John Howard Society of Peel, Halton and Dufferin, Community Services | Milton |
| Joseph Brant Hospital | Burlington |
| Joseph Brant Hospital, Burlington - Joseph Brant Community Health Centre, Community Mental Health Services (Outpatient) | Burlington |
| Joseph Brant Hospital, Burlington - Wellness House, Hospital Based Outpatient Services | Burlington |
| Joseph Brant Hospital, Emergency Department | Burlington |
| Joseph Brant Hospital, Maternal and Child Program | Burlington |
| Joseph Brant Hospital, Nina's Place: Regional Sexual Assault and Domestic Violence Care Centre | Burlington |
| Joshua Creek Heritage Art Centre | Oakville |
| Joshua Creek Medical, Family Practice and Walk-in | Oakville |
| Joy of Learning Centre | Oakville |
| Joyce Family Foundation (The) | Burlington |
| Junior Achievement of Central Ontario | Toronto |
| Just Be You, Oakville - Oak Park Neighbourhood Centre, Peer-to-Peer Social Group | Oakville |
