| Country: | Wales |
| Coordinates: | 52.888°N -4.65°W |
| Official Name: | Penllech |
| Static Image Name: | Chapel at Penllech Bach - geograph.org.uk - 62252.jpg |
| Static Image Caption: | Chapel at Penllech Bach |
| 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: | SH218356 |
Penllech is a hamlet and former civil parish in the Welsh county of Gwynedd. The parish was abolished in 1934, and incorporated into Tudweiliog.[1]