| Brant County Health Unit | 125,136 |
| Central East Health Integration Network | 1,432,695 |
| Central Health Integration Network | 1,532,649 |
| Central West Health Integration Network | 739,957 |
| Champlain Health Integration Network | 1,147,209 |
| Chatham-Kent Health Unit | 108,589 |
| City of Hamilton Health Unit | 504,559 |
| City of Ottawa Health Unit | 812,129 |
| City of Toronto Health Unit | 2,503,281 |
| District of Algoma Health Unit | 116,252 |
| Durham Regional Health Unit | 561,258 |
| Eastern Ontario Health Unit | 190,583 |
| Elgin-St. Thomas Health Unit | 85,351 |
| Erie St. Clair Health Integration Network | 630,195 |
| Grey Bruce Health Unit | 157,760 |
| Haldimand-Norfolk Health Unit | 107,775 |
| Haliburton, Kawartha, Pine Ridge District Health Unit | 171,671 |
| Halton Regional Health Unit | 439,256 |
| Hamilton Niagara Haldimand Brant Health Integration Network | 1,315,964 |
| Hastings and Prince Edward Counties Health Unit | 155,970 |
| Huron County Health Unit | 59,325 |
| Kingston, Frontenac and Lennox and Addington Health Unit | 184,407 |
| Lambton Health Unit | 128,204 |
| Leeds, Grenville and Lanark District Health Unit | 162,991 |
| Middlesex-London Health Unit | 422,333 |
| Mississauga Halton Health Integration Network | 1,008,004 |
| Niagara Regional Area Health Unit | 427,421 |
| North Bay Parry Sound District Health Unit | 122,848 |
| North East Health Integration Network | 551,691 |
| North Simcoe Muskoka Health Integration Network | 422,902 |
| North West Health Integration Network | 234,599 |
| Northwestern Health Unit | 80,532 |
| Oxford County Health Unit | 102,756 |
| Peel Regional Health Unit | 1,159,405 |
| Perth District Health Unit | 74,344 |
| Peterborough County-City Health Unit | 133,080 |
| Porcupine Health Unit | 84,159 |
| Renfrew County and District Health Unit | 99,369 |
| Simcoe Muskoka District Health Unit | 479,767 |
| South East Health Integration Network | 466,669 |
| South West Health Integration Network | 901,123 |
| Sudbury and District Health Unit | 192,391 |
| Thunder Bay District Health Unit | 154,067 |
| Timiskaming Health Unit | 34,217 |
| Toronto Central Health Integration Network | 1,090,301 |
| Waterloo Health Unit | 478,121 |
| Waterloo Wellington Health Integration Network | 686,324 |
| Wellington-Dufferin-Guelph Health Unit | 254,861 |
| Windsor-Essex County Health Unit | 393,402 |
| York Regional Health Unit | 892,712 |
