| Country: | Wales |
| Coordinates: | 52.866°N -4.662°W |
| Official Name: | Llangwnnadl |
| Static Image Name: | Maen Hir Llangwnnadl Standing Stone - geograph.org.uk - 532427.jpg |
| Static Image Caption: | Standing stone |
| Unitary Wales: | Gwynedd |
| Lieutenancy Wales: | Gwynedd |
| Constituency Welsh Assembly: | Dwyfor Meirionnydd |
| Constituency Westminster: | Dwyfor Meirionnydd |
| Community Wales: | Tudweiliog |
| Postcode District: | LL53 |
| Postcode Area: | LL |
| Post Town: | PWLLHELI |
| Dial Code: | 01758 |
| Os Grid Reference: | SH208331 |
Llangwnnadl is a village and former civil parish in the Welsh county of Gwynedd. The parish was abolished in 1934, and incorporated into Tudweiliog.[1]