| Lannédern | |
| Native Name: | Lannedern |
| Commune Status: | Commune |
| Coordinates: | 48.3014°N -3.8961°W |
| Insee: | 29115 |
| Postal Code: | 29190 |
| Arrondissement: | Châteaulin |
| Canton: | Briec |
| Mayor: | Pauline Caro[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pleyben-Châteaulin-Porzay |
| Elevation Min M: | 80 |
| Elevation Max M: | 201 |
| Area Km2: | 12.43 |
Lannédern (in French pronounced as /lanedɛʁn/;) is a commune in the Finistère department of Brittany in north-western France.