- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 50°33'17"N 4°48'56"W
- Eastings/Northings: 200642, 76587
- OS Grid: SX006765
- Mapcode Local: GBR ZV.K4BK
- Mapcode Global: FRA 07SL.RMZ
Location and coordinates are for the approximate centre of Trewethern within this administrative area.
Geographic features and populated places may cross administrative borders.