| Country: | Wales |
| Coordinates: | 52.971°N -3.397°W |
| Official Name: | Llangar |
| Static Image Name: | Llangar Church. - geograph.org.uk - 559314.jpg |
| Static Image Width: | 250 |
| Static Image Caption: | Llangar Church |
| Unitary Wales: | Denbighshire |
| Lieutenancy Wales: | Clwyd |
| Constituency Welsh Assembly: | Clwyd South |
| Constituency Westminster: | Dwyfor Meirionnydd |
| Community Wales: | Cynwyd, Denbighshire |
| Postcode District: | LL21 |
| Postcode Area: | LL |
| Post Town: | CORWEN |
| Dial Code: | 01490 |
| Os Grid Reference: | SJ0642 |
Llangar is a former civil parish in Denbighshire in Wales, 1miles south west of Corwen, its post town, and 10miles north east of Bala. It is situated at the confluence of the rivers Alwen and Dee, and includes the small hamlets of Bryn, Cymer, and Gwynodl. A large portion of the parish is barren. The small village stands on the road from Corwen, by the Vale of Edeyrnion. The Dee is crossed by a bridge about 1miles away at Cynwyd. It lies in the bro and former cwmwd of Edeirnion.
Llangar Church is a remote rural church that was abandoned in 1856 but survived to become a Cadw guardianship building, open to the public, with a near complete 18th century church interior, and is a Grade 1 listed building.