| Locality | Post Code |
|---|---|
| Rhyd-Y-Foel, Conwy | LL22 |
| Rhydlanfair, Conwy | LL24 |
| Rhydlydan, Conwy | LL24 |
| Roman Bridge, Conwy | LL25 |
| Rowen, Conwy | LL32 |
| Saint George, Conwy | LL22 |
| Segurinside, Conwy | LL31 |
| Tal-Y-Bont, Conwy | LL32 |
| Tal-Y-Cafn, Conwy | LL28 |
| Tan-Y-Lan, Conwy | LL29 9AN, LL29 9AN, LL29 … |
| Towyn, Conwy | LL22 |
| Trefriw, Conwy | LL27 |
| Tremarl Industrial Estate, Conwy | LL31 9PN, LL31 9PW |
| Trofarth, Conwy | LL22 |
| Ty Nant, Conwy | LL21 |
| Tyn-Y-Groes, Conwy | LL32 |
| Ysbyty Ifan, Conwy | LL24 |