| Lucien-Antoine Lagier | |
| Birth Date: | 4 October 1814 |
| Birth Place: | Saint-André-d’Embrun, Hautes-Alpes, France |
| Death Place: | Isle-Verte, Rivière-du-Loup County, Quebec |
Lucien-Antoine Lagier (4 October 1814 - 28 February 1874) was a Canadian priest, Oblate of Mary Immaculate, and preacher.