- Category: Populated Place
- Type: Village
- Latitude/Longitude: 52°21'23"N 4°1'57"W
- Eastings/Northings: 261666, 275111
- OS Grid: SN616751
- Mapcode Local: GBR 8T.SRQB
- Mapcode Global: VH4FS.11X8
Location and coordinates are for the approximate centre of Pentre-llyn within this administrative area.
Geographic features and populated places may cross administrative borders.