- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 51°27'19"N 3°16'27"W
- Eastings/Northings: 311562, 173698
- OS Grid: ST115736
- Mapcode Local: GBR HT.MF46
- Mapcode Global: VH6FC.6PD7
Location and coordinates are for the approximate centre of Twyn-yr-odyn within this administrative area.
Geographic features and populated places may cross administrative borders.