| Fonmon | |
|---|---|
 Village pond, Fonmon | |
  Fonmon Location within the Vale of Glamorgan | |
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Postcode district | CF |
| Police | South Wales |
| Fire | South Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Fonmon (Welsh: Ffwl-y-mwn) is a hamlet in the Vale of Glamorgan in south Wales. It lies just off the B4265 road to the northwest of Font-y-Gary and Rhoose on the western side of Cardiff Airport. The hamlet is best known for its central duck pond and Fonmon Castle, a historical house located on the otherside of the B4265 road to the north. The largest house in the hamlet is called The Gables, accessed off a drive on the left approaching Fonmon from the north. A number of the houses in the area are thatched roofed.