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.