| Lanildut | |
| Native Name: | Lannildud |
| Commune Status: | Commune |
| Coordinates: | 48.4739°N -4.7444°W |
| Insee: | 29112 |
| Postal Code: | 29840 |
| Arrondissement: | Brest |
| Canton: | Saint-Renan |
| Mayor: | Jean-Noël Briant[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays d'Iroise |
| Elevation Min M: | 0 |
| Elevation Max M: | 71 |
| Area Km2: | 5.82 |
Lanildut (in French pronounced as /lanildyt/;) is a commune in the Finistère department of Brittany in north-western France.
Inhabitants of Lanildut are called in French Lanildutiens.