- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 52°49'49"N 4°6'12"W
- Eastings/Northings: 258385, 327942
- OS Grid: SH583279
- Mapcode Local: GBR 5Q.TRPS
- Mapcode Global: WH565.Y441
Location and coordinates are for the approximate centre of Pen-sarn within this administrative area.
Geographic features and populated places may cross administrative borders.