| Big Brothers Big Sisters of Barrie and District, Mailing Address | Barrie |
| Big Brothers Big Sisters of Dufferin & District | Orangeville |
| Big Brothers Big Sisters of Grey Bruce | Owen Sound |
| Big Brothers Big Sisters of Kawartha Lakes - Haliburton | Kawartha Lakes |
| Big Brothers Big Sisters of Listowel & District | North Perth |
| Big Brothers Big Sisters of Listowel & District, Couples for Kids | North Perth |
| Big Brothers Big Sisters of Listowel & District, Group Mentor Program | North Perth |
| Big Brothers Big Sisters of Listowel & District, In-School Mentor Program | North Perth |
| Big Brothers Big Sisters of Muskoka | Bracebridge |
| Big Brothers Big Sisters of North Simcoe | Midland |
| Big Brothers Big Sisters of Northumberland, Cobourg, Mentoring Program | Cobourg |
| Big Brothers Big Sisters of Orillia and District | Orillia |
| Big Brothers Big Sisters of Peterborough, George St S, Mentoring Programs | Peterborough |
| Big Brothers Big Sisters of South Bruce North Huron | Kincardine |
| Big Brothers Big Sisters of South Huron | South Huron |
| Blacks For All Races, Barrie | Barrie |
| Bruce Grey Mentorship | Hanover |
| Canadian Alopecia Areata Foundation | King Township |
| Friendship Ministries, Kincardine Friendship Group | Kincardine |
| Georgian College, Barrie Campus - Bldg A - Room A216, Centre for Changemaking and Social Innovation | Barrie |
| Georgian College, Orillia Campus, Centre for Changemaking and Social Innovation | Orillia |
| Heads Up for Inclusion | Peterborough |
| Hope Barrie, Barrie - Mary St, Hope Centre | Barrie |
| John Howard Society of Peterborough | Peterborough |
| New Canadians Centre, Peterborough Branch | Peterborough |
| Nogojiwanong Friendship Centre, Gender Diverse Indigenous Mentor Program | Peterborough |
| We are the Villagers, Midland | Midland |
| Youth Unlimited, Collingwood, YFC Collingwood | Collingwood |