| Organization Name(s) | Located In |
| J Keeping Drug Ltd | Capreol |
| Jackpine Community Centre | Thunder Bay |
| Jacques, Dr Raymond, Physician | Sudbury |
| James B Davis, Dentist | Timmins |
| James Bay General Hospital | Moosonee |
| James Bay General Hospital | Attawapiskat |
| James Bay General Hospital, Mental Health Program | Moosonee |
| James Bay General Hospital, Moosonee Health Centre | Moosonee |
| James Township | Elk Lake |
| Janeway Pharmacy Limited | Massey |
| Janzen's Pharmacy and Compounding Centre | Thunder Bay |
| Japanese Canadian 55 Plus Club | Thunder Bay |
| Jarlette Health Services, Manitoulin Lodge | Gore Bay |
| Jarlette Health Services, Temiskaming Lodge | Haileybury |
| Jarvensivu Chiropractic Clinic | South Porcupine |
| Jeanette Oscar Lindokken Nursing Station | Deer Lake |
| Jeeves, Dr Nicholas, Family Physician | Mindemoya |
| Jehovah's Witnesses, Kingdom Hall | Kenora |
| Jehovah's Witnesses, Kingdom Hall, Gardenia and Autumnwood Congregations | Thunder Bay |
| Jehovah's Witnesses, Kingdom Hall, Heath Park and Vickers Congregations | Thunder Bay |
| Jennifer Ashleigh Children's Charity | Uxbridge |
| Jocelyn. Township of | Jocelyn Township |
| John Howard Society of Sault Ste Marie and District | Sault Ste Marie |
| John Howard Society of Sault Ste Marie and District, Employment Resource Centre | Sault Ste Marie |
| John Howard Society of Sudbury | Sudbury |
| John Howard Society of Thunder Bay and District | Thunder Bay |
| Johnson. Township of | Desbarats |
| Jubilee Heritage Family Resources | Sudbury |
| Jubilee Heritage Family Resources, Aboriginal Daycare | Sudbury |
| Jubilee Heritage Family Resources, West End Best Start Hub | Sudbury |
| Junction Creek Stewardship Committee Inc | Sudbury |
| June Steeve-Lendrum Family Resource Centre | Thunder Bay |
| Justice Derek Holder House | Sault Ste Marie |
