- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 50°48'57"N 4°21'53"W
- Eastings/Northings: 233500, 104500
- OS Grid: SS335045
- Mapcode Local: GBR KB.XS3B
- Mapcode Global: FRA 16RY.1BN
Location and coordinates are for the approximate centre of Trewyn within this administrative area.
Geographic features and populated places may cross administrative borders.