| F.A.S.T. Rescue Inc | Concord |
| Fair Practices Commission | Toronto Downtown |
| Family First Play Therapy Centre | Barrie |
| Family Mental Health Initiative of Simcoe County | Barrie |
| Farm Credit Canada, Thornton | Essa |
| Farm View newspaper, Farm View | Minesing |
| February Blues Festival | Barrie |
| Federated Women's Institutes of Ontario, Mailing Address, Simcoe South Kempenfeldt District | Ontario |
| Federated Women's Institutes of Ontario, Meeting Location, Simcoe Area | Minesing |
| Fiddlehead Care Farm | Mono |
| Fierté Simcoe Pride | Barrie |
| Find a Registered Assistive Devices Vendor, Online Service | |
| Firearm Safety Education Service of Ontario, Mailing Address | Orillia |
| First Presbyterian Church, Collingwood, Community Dinners | Collingwood |
| FOCUS Employment Services, FOCUS Employment Services - Alliston, Integrated Employment Services | New Tecumseth |
| FOCUS Employment Services, FOCUS Employment Services - Angus, Focus Community Development Corporation | Angus |
| FOCUS Employment Services, Ontario Employment Services, Angus | Angus |
| Friendly Wendy Senior Services | Barrie |
| Friends of the Nancy Island Historic Site and Wasaga Beach Park | Wasaga Beach |
| Friendship Force Lake Simcoe | Simcoe County |
| Full Circle Lactation Services | Barrie |
| Furry Friends Animal Shelter, Barrie | Barrie |
| Future Skills Centre | Toronto |