| Site of Special Scientific Interest | |
| Location | Carmarthenshire |
|---|---|
| Grid reference | SN5418845716 |
| Coordinates | 52°05′26″N4°07′47″W / 52.090527°N 4.1297411°W |
| Interest | Wildlife |
| Area | 3.83 ha |
| Notification | 3 September 1987 |
Corsydd a Rwyth Cilyblaidd is a wetland area that is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales.