| Site of Special Scientific Interest | |
| Location | Clwyd | 
|---|---|
| Grid reference | SJ0634579397 | 
| Coordinates | 53°18′12″N3°24′25″W / 53.303211°N 3.4068622°W | 
| Interest | Biological | 
| Area | 4.37 ha | 
| Notification | 11 November 1999 | 
Maes Hiraddug is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
It is species-rich neutral grassland which includes notable species including spiny restharrow and the greater butterfly orchid. The reserve is managed by the North Wales Wildlife Trust. [1] It is an example of wildflower meadow which pre-dates modern agricultural land management.