| Landudec | |
| Native Name: | Landudeg |
| Commune Status: | Commune |
| Coordinates: | 48.0011°N -4.3353°W |
| Insee: | 29108 |
| Postal Code: | 29710 |
| Arrondissement: | Quimper |
| Canton: | Plonéour-Lanvern |
| Mayor: | Yves Le Guellec[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Haut-Pays Bigouden |
| Elevation Min M: | 33 |
| Elevation Max M: | 131 |
| Area Km2: | 20.56 |
Landudec (in French pronounced as /lɑ̃dydɛk/;) is a commune in the Finistère department of Brittany in north-western France.
Inhabitants of Landudec are called Landudecois.