| Type: | parish |
| Official Name: | Castanheira |
| Region: | Norte |
| Cim: | Alto Minho |
| District: | Viana do Castelo |
| Municipality: | Paredes de Coura |
| Area Total: | 7.76 |
| Population Total: | 631 |
| Population As Of: | 2011 |
| Coordinates: | 41.9°N -8.552°W |
Castanheira is a civil parish in the municipality of Paredes de Coura, Portugal. The population in 2011 was 631,[1] in an area of 7.76 km2.[2]