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| Trearddur Bay | |
|---|---|
 | |
  Trearddur Bay Location within Anglesey | |
| Population | 1,686 (2011) |
| Community |
|
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | Holyhead |
| Postcode district | LL65 |
| Police | North Wales |
| Fire | North Wales |
| Ambulance | Welsh |
Trearddur or Trearddur Bay (Welsh: Bae Trearddur) is a village, seaside resort and community south of Holyhead on the west coast of Holy Island off the north-west coast of Anglesey in Wales. The community includes the small settlement of Penrhosfeilw and the Refail Farm estate.