| Landujan | |
| Native Name: | Landujan |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Landujan (Ille-et-Vilaine).svg |
| Coordinates: | 48.2508°N -1.995°W |
| Insee: | 35143 |
| Postal Code: | 35360 |
| Arrondissement: | Rennes |
| Canton: | Montauban-de-Bretagne |
| Mayor: | Serge Henry[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Saint-Méen Montauban |
| Elevation Min M: | 62 |
| Elevation Max M: | 118 |
| Area Km2: | 14.32 |
Landujan (in French pronounced as /lɑ̃dyʒɑ̃/; ; Gallo: Landujan) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.
Inhabitants of Landujan are called Landujannais in French.