| Country | Wales |
|---|---|
| UK region | Wales |
| Postcode area | SY |
| Unitary Authority | Gwynedd |
Mawddwy postcode districts
Mawddwy has 1 postcode district
Mawddwy postcode sectors
Mawddwy has 1 postcode sector
| Country | Wales |
|---|---|
| UK region | Wales |
| Postcode area | SY |
| Unitary Authority | Gwynedd |
Mawddwy has 1 postcode district
Mawddwy has 1 postcode sector