Career
He represented Iberville in the Legislative Assembly of Quebec from 1881 to 1886 as a Liberal. He was born in Saint-Jean-Chrysostome, Lower Canada, the son of Alexis Demers and Josephte Bessette. Demers was also a justice of the peace and captain in the militia.
He was secretary-treasurer and then mayor for Saint-Georges d"Henryville.
Demers was married twice: to Marie-Julie Brazeau in 1849 and to Marie Goyette in 1855. He was reelected in 1886 but died in office at the age of 61 in Henryville.