| Name | Locations | |
|---|---|---|
| Udney | Bala | 77.5 |
| Orillia | 0.0 | |
| Uhthoff | Midland | 50.64 |
| Umfreville | Graham | 137.5 |
| Unaka | Graham | 116.2 |
| Underwood | Uxbridge | 52.0 |
| Unionville | Uxbridge | 49.83 |
| Upper Canada College | Toronto Belt Line | 3.60 |
| Uptergrove | Midland | 37.98 |
| Uptergrove | Orillia | 5.5 |
| Utopia | Meaford | 8.01 |
| Utterson | Huntsville | 23.23 |
| Uxbridge | Uxbridge | 28.43 |