- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 52°34'41"N 3°12'14"W
- Eastings/Northings: 318500, 298500
- OS Grid: SO185985
- Mapcode Local: GBR 9X.BRSL
- Mapcode Global: WH7B1.RGDB
Location and coordinates are for the approximate centre of Trwstllewelyn within this administrative area.
Geographic features and populated places may cross administrative borders.