| Organization / Program Name(s) | Located In |
|---|---|
| IAVGO Community Legal Clinic | Toronto |
| Income Security Advocacy Centre | Toronto |
| Independent Electricity System Operator, Mailing Address, Save on Energy | Barrie |
| Independent Order of Odd Fellows, Exeter, Lodge 67 | Exeter |
| Independent Order of Odd Fellows, Stratford - The Grand Lodge of Ontario, Avon Lodge #41 | Stratford |
| Insurance Bureau of Canada, Consumer Information Centre | Toronto |
| IODE, Festival Jubilee Chapter | Stratford |
| It Takes a Village | North Perth |