| Llanddona fish weir | |
|---|---|
| Gorad Llanddona | |
 Red Wharf Bay with fish weir in the distance | |
| Type | fish weir |
| Location | Anglesey, Wales |
| Coordinates | 53°18′29″N 4°08′38″W / 53.308°N 4.144°W |
| OS grid reference | SH 5725 8116 |
| Official name | Llanddona Fish Weir |
| Designated | 31 October 2002 |
| Reference no. | AN137 |
  Location in Anglesey | |
Llanddona fish weir (also known as Welsh: Gorad Llanddona or Welsh: Gorad Fona) is a post-medieval fish trap sited in Llanddona, on the Isle of Anglesey. The fish weir is a scheduled monument.