| Betws Garmon, Gwynedd |
LL54 |
| Blaenau Ffestiniog, Gwynedd |
LL41 |
| Boduan, Gwynedd |
LL53 |
| Bontddu, Gwynedd |
LL40 |
| Bontnewydd, Gwynedd |
LL54, LL55 |
| Bontnewydd (Dolgellau), Gwynedd |
LL40 |
| Borth-Y-Gest, Gwynedd |
LL49 |
| Botwnnog, Gwynedd |
LL53 |
| Braichmelyn, Gwynedd |
LL57 |
| Brithdir, Gwynedd |
LL40 |
| Bron Aber, Gwynedd |
LL41 |
| Bryn Mawr, Gwynedd |
LL53 |
| Bryncir, Gwynedd |
LL51 9LX |
| Bryncroes, Gwynedd |
LL53 |
| Bryncrug, Gwynedd |
LL36 |
| Brynrefail, Gwynedd |
LL55 |
| Bwlch Derwin, Gwynedd |
LL51 |
| Bwlchtocyn, Gwynedd |
LL53 |
| Cae Clyd, Gwynedd |
LL41 |
| Caeathro, Gwynedd |
LL55 |
| Caerhun, Gwynedd |
LL57 |
| Caernarfon, Gwynedd |
LL54, LL55 |
| Capel Celyn, Gwynedd |
LL23 7NY |
| Capel Uchaf, Gwynedd |
LL54 5DH |
| Capel Y Graig, Gwynedd |
LL57 |
| Carmel, Gwynedd |
LL54 |