| Organization Name(s) | Located In |
| J B Music | Elmvale |
| J.H. Lynn Chapel. Lynn-Carson Funeral Home | Midland |
| Jacques [Romy] Translation Service | Barrie |
| James Keating Elementary School, Breakfast Club | Penetanguishene |
| James Keating Elementary School. Penetanguishene | Penetanguishene |
| James Whittier, Chartered Accountant | Midland |
| Janine Hutchinson Tutoring | Barrie |
| Japanese Sword Society of Canada | Barrie |
| Javelin Co-operative Homes Incorporated | Midland |
| JD's Scrumptious Lunches | Collingwood |
| Jean Hills Physiotherapy | Orillia |
| Jean Vanier Catholic High School | Collingwood |
| Jean's Housing Hotline Barrie | Barrie |
| Jeanettes Happy Feet, Jeanettes Basic Foot Care | Orillia |
| Jefferies [Dr J] | Orillia |
| Jehovah's Witnesses. Alliston | Alliston |
| Jehovah's Witnesses. Barrie | Barrie |
| Jehovah's Witnesses. Bradford West Gwillimbury | Bradford West Gwillimbury |
| Jehovah's Witnesses. Collingwood | Collingwood |
| Jehovah's Witnesses. Innisfil | Innisfil |
| Jehovah's Witnesses. Midland East Congregation | Midland |
| Jehovah's Witnesses. Midland West Congregation | Midland |
| Jehovah's Witnesses. Orillia | Orillia |
| Jen's Place Therapeutic Group Care, 2044667 ONT INC., The REAL Program - Private School, Jen's Place Supervised Access Program | Alliston |
| Jennifer Ashleigh Children's Charity | Uxbridge |
| Jennings Lodge Retirement Home | Penetanguishene |
| Jeremy Viinalass Violin Studio | Barrie |
| Jewel 88.5 FM | Toronto |
| Jewish Community Of Barrie | Barrie |
| Jilesen [Dr Herman] | Midland |
| John Howard Society of Simcoe and Muskoka. Barrie Office | Barrie |
| John Howard Society of Simcoe and Muskoka. Barrie Office, Community Service Order Program - Adult | Barrie |
| John Howard Society of Simcoe and Muskoka. Barrie Office, Community Service Order Program - Youth | Barrie |
| John Howard Society of Simcoe and Muskoka. Barrie Office, Community Work Program - Intermittent Module | Barrie |
| John Howard Society of Simcoe and Muskoka. Barrie Office, Institutional Services | Barrie |
| John Howard Society of Simcoe and Muskoka. Orillia Location, Community Service Order Program - Adult | Orillia |
| John Howard Society of Simcoe and Muskoka. Orillia Location, Non Residential Attendance Centre - North Simcoe | Orillia |
| Johnson Children's Services Inc | Bradford |
| Johnson Street Public School | Barrie |
| Johnson, Dr. J. | Penetanguishene |
| Johnston [Donald G] | Barrie |
| Johnston [Dr R] | Orillia |
| JoneSure Financial Inc., The Co-operators. Midland Downtown | Midland |
| Joseph Blake Law Office | Midland |
| JOY Fellowship | Barrie |
| Joy of Music: Early Childhood Music Education | Barrie |
| Joybells and Belltones Handbell Choirs | Barrie |
| Joyland Beach Community Centre | Ramara |
| Juanita's Sew & Serge | Midland |
| Jubilee Chorale | Orillia |
| Jubilee Presbyterian Church | Stayner |
| Jubilee Women's Missionary Society | Stayner |
| Juhan Puhm Music | Barrie |
| June's Mobile Massage | Midland |
| Junior Civitan Club of Barrie | Barrie |
| Junior Farmers Association of Ontario, North Simcoe Junior Farmers | Simcoe North |
| Juvenile Diabetes Information Group | Collingwood |
| Juvenile Diabetes Research Foundation Canada. Barrie Chapter | Midhurst |