| Napoléon Séguin | |
| Office: | Member of the Legislative Assembly of Quebec for Montréal division no. 1 |
| Predecessor: | Georges-Albini Lacombe |
| Successor: | District was abolished in 1912 |
| Term Start: | 1908 |
| Term End: | 1912 |
| Office2: | Member of the Legislative Assembly of Quebec for Montréal–Sainte-Marie |
| Predecessor2: | District was abolished in 1912 |
| Successor2: | Joseph Gauthier |
| Term Start2: | 1912 |
| Term End2: | 1921 |
| Birth Date: | 13 December 1865 |
| Birth Place: | Sainte Madeleine de Rigaud, Canada East |
| Death Place: | Montréal-Nord, Quebec |
| Party: | Liberal |
Napoléon Séguin (December 13, 1865 - January 29, 1940) was a Canadian politician.
Born in Sainte Madeleine de Rigaud, Canada East, Séguin was acclaimed to the Legislative Assembly of Quebec for Montréal division no. 1 in 1908. A Liberal, he was re-elected in Montréal–Sainte-Marie in 1912, 1916, and 1919. He was a Minister without Portfolio in the cabinet of Lomer Gouin in 1919 and in the cabinet of Louis-Alexandre Taschereau in 1920.
He resigned in 1921 when he was appointed Governor of the Bordeaux Prison, a post he held until 1939.
He died in Montréal-Nord in 1940.