- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 51°54'16"N 3°48'44"W
- Eastings/Northings: 275421, 224442
- OS Grid: SN754244
- Mapcode Local: GBR Y3.Q511
- Mapcode Global: VH4J0.VDZ8
Location and coordinates are for the approximate centre of Twynllanan within this administrative area.
Geographic features and populated places may cross administrative borders.