| Country: | Wales |
| Official Name: | Twyn-yr-Odyn |
| Coordinates: | 51.4567°N -3.2739°W |
| Static Image: | Horse and Jockey Inn, Twyn-Yr-Odyn, Cardiff. - geograph.org.uk - 372936.jpg |
| Static Image Width: | 250px |
| Static Image Caption: | The Horse and Jockey Inn |
| Unitary Wales: | Vale of Glamorgan |
| Lieutenancy Wales: | South Glamorgan |
| Constituency Welsh Assembly: | Vale of Glamorgan |
| Constituency Westminster: | Vale of Glamorgan |
| Post Town: | CARDIFF |
| Postcode District: | CF5 |
| Postcode Area: | CF |
Twyn-yr-Odyn (Welsh: Twynyrodyn) is a hamlet in the Vale of Glamorgan, southeast Wales, just beyond the territorial border of western Cardiff. It lies just southwest of Culverhouse Cross, very close to Wenvoe and St Lythans.[1] The Wenvoe Transmitter is located here. It is home to a pub named the Horse and Jockey Inn.There is an allotment in the vicinity.