- Category: Populated Place
- Type: Village
- Latitude/Longitude: 53°2'35"N 4°16'58"W
- Eastings/Northings: 247043, 351978
- OS Grid: SH470519
- Mapcode Local: GBR 5H.DB1R
- Mapcode Global: WH43T.5RQY
Location and coordinates are for the approximate centre of Llanllyfni within this administrative area.
Geographic features and populated places may cross administrative borders.