- Category: Populated Place
- Type: Village
- Latitude/Longitude: 52°56'23"N 3°57'33"W
- Eastings/Northings: 268421, 339851
- OS Grid: SH684398
- Mapcode Local: GBR 5X.LYGH
- Mapcode Global: WH55P.4CTK
Location and coordinates are for the approximate centre of Gellilydan within this administrative area.
Geographic features and populated places may cross administrative borders.