He represented Ottawa electoral district in the Legislative Assembly of Quebec from 1886 to 1887 as a Conservative.
He was born in Saint-Calixte-de-Somerset, Canada East, the son of Olivier Cormier and Emmérence Beaubien.
Cormier lived in New Hampshire from 1861 until 1867, when he moved to Aylmer, Quebec and established himself there as a lumber merchant and grocer.
Cormier owned a sawmill in Aylmer and a lumber yard in Petawawa, Ontario.
Cormier was president of the school board and of the local Saint-Jean-Baptiste Society.