- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 53°0'13"N 3°5'15"W
- Eastings/Northings: 327119, 345710
- OS Grid: SJ271457
- Mapcode Local: GBR 72.GSL6
- Mapcode Global: WH77Z.JRZN
Location and coordinates are for the approximate centre of Trefechan within this administrative area.
Geographic features and populated places may cross administrative borders.