| Ontario. Ministry of Environment, Conservation and Parks | Barrie |
| Ontario. Ministry of Environment, Conservation and Parks, Aurora District Office, Holland Marsh Provincial Wildlife Management Area | Bradford West Gwillimbury |
| Ontario. Ministry of Environment, Conservation and Parks, Awenda Provincial Park, Ontario Parks - Awenda Provincial Park | Penetanguishene |
| Ontario. Ministry of Environment, Conservation and Parks, Barrie Office | Barrie |
| Ontario. Ministry of Environment, Conservation and Parks, Bracebridge Field Office | Bracebridge |
| Ontario. Ministry of Environment, Conservation and Parks, Copeland Forest, Midhurst (Huronia) District Office | Springwater |
| Ontario. Ministry of Environment, Conservation and Parks, Ferris Provincial Park, Ontario Parks - Ferris Provincial Park | Trent Hills |
| Ontario. Ministry of Environment, Conservation and Parks, Midhurst District Office, Midhurst (Huronia) District Office | Springwater |
| Ontario. Ministry of Environment, Conservation and Parks, Minden - Hwy 35, Minden Area Office | Minden Hills |
| Ontario. Ministry of Environment, Conservation and Parks, North Kawartha, Ontario Parks - Kawartha Highlands Provincial Park | Bancroft |
| Ontario. Ministry of Environment, Conservation and Parks, Oro-Medonte, Ontario Parks - Bass Lake Provincial Park | Orillia |
| Ontario. Ministry of Environment, Conservation and Parks, Owen Sound Field Office | Owen Sound |
| Ontario. Ministry of Environment, Conservation and Parks, Parry Sound District Office, Southern Region | Parry Sound |
| Ontario. Ministry of Environment, Conservation and Parks, Peterborough - Mailing Address, Natural Resources Information and Support Centre | Peterborough |
| Ontario. Ministry of Environment, Conservation and Parks, Pinery Provincial Park, Ontario Parks - Pinery Provincial Park | Lambton Shores |
| Ontario. Ministry of Environment, Conservation and Parks, Port Severn, Ontario Parks - Six Mile Lake Provincial Park | Port Severn |
| Ontario. Ministry of Environment, Conservation and Parks, Presqu'ile Provincial Park, Ontario Parks - Presqu'ile Provincial Park | Brighton (Municipality of) |
| Ontario. Ministry of Environment, Conservation and Parks, Thornbury, Niagara Escarpment Commission | Blue Mountains |
| Ontario. Ministry of Environment, Conservation and Parks, Woodview, Ontario Parks - Petroglyphs Provincial Park | North Kawartha |