| Llan Ddu Fawr | |
| Elevation M: | 594 |
| Prominence M: | 168 |
| Parent Peak: | Pumlumon |
| Listing: | Marilyn |
| Location: | Ceredigion |
| Grid Ref Uk: | SN790704 |
Llan Ddu Fawr or Waun Claerddu is a hill located in Ceredigion, Wales, at 594m (1,949feet) above sea level. It is located about 10 miles south of Pumlumon. The surrounding land can be very boggy. There is a trig point at the summit, but this is not the highest point. There is also a cairn of about 15 meters in diameter.[1] The peak is located within the region known as the Desert of Wales.