| School | Address | Town | County | |
|---|---|---|---|---|
| Ysgol Tan Y Gaer | Bryn Tirion Hall | Wrexham | Flintshire (Sir y Fflint) | Select |
| Ysgol Tanycastell | Harlech | Gwynedd | Select | |
| Ysgol Terrig | Ffordd Y Llan | Sir Y Fflint | Select | |
| Ysgol Tir Morfa | Ffordd Derwen | Denbighshire | Select | |
| Ysgol Treferthyr | Pwllheli Road | Criccieth | Gwynedd | Select |
| Ysgol Treffynnon | The Strand | Flintshire | Select | |
| Ysgol Trefnant | Henllan Road | Denbighshire | Select | |
| Ysgol Trefonnen Church In Wales Community Primary | Trefonnen Lane | Powys | Select | |
| Ysgol Tregarth | Tregarth | Gwynedd | Select | |
| Ysgol Tremeirchion | Tremeirchion | Sir Ddinbych | Select |