- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 51°57'25"N 3°16'29"W
- Eastings/Northings: 312500, 229500
- OS Grid: SO125295
- Mapcode Local: GBR YV.LSD5
- Mapcode Global: VH6C1.624J
Location and coordinates are for the approximate centre of Llandefaelog-tre'r-graig within this administrative area.
Geographic features and populated places may cross administrative borders.