- Category: Populated Place
- Type: Village
- Latitude/Longitude: 52°53'45"N 4°27'9"W
- Eastings/Northings: 235108, 335976
- OS Grid: SH351359
- Mapcode Local: GBR 58.PQTC
- Mapcode Global: WH44H.KGWT
Location and coordinates are for the approximate centre of Efailnewydd within this administrative area.
Geographic features and populated places may cross administrative borders.