| Antoine Casavant | |
| Office: | Member of the Legislative Assembly of Quebec for Bagot |
| Successor: | Joseph Pilon |
| Term Start: | 1881 |
| Term End: | 1886 |
| Birth Date: | 20 October 1826 |
| Birth Place: | Saint-Hyacinthe, Lower Canada |
| Death Place: | Saint-Dominique, Quebec |
| Party: | Conservative |
Antoine Casavant (October 20, 1826 - July 18, 1892) was a farmer and political figure in Quebec. He represented Bagot in the Legislative Assembly of Quebec from 1881 to 1886 as a Conservative. His name also appears as Antoine Casavant dit Ladébauche.
He was born in Saint-Hyacinthe, Lower Canada, the son of Antoine Casavant dit Ladébauche and Marie Benoît, and was educated at the Séminaire de Saint-Hyacinthe. Casavant served as a captain in the militia, a justice of the peace and a commissioner for the trial of minor causes. He was also president of the agricultural society for Bagot County and a member of the Quebec agricultural council. He helped found a beet sugar plant at Farnham. He was married twice: to Rosalie Piedalue in 1850 and to Marie-Hermine Vachon in 1868. Casavant served on the municipal council for Saint-Dominique. He ran unsuccessfully for the Saint-Hyacinthe seat in the Quebec assembly in 1878 and 1879. Casavant died in Saint-Dominique at the age of 65.