Ferdinand Gagnon (8 June 1849 – 15 April 1886) was a Canadian born American journalist.
At age 19, he joined a substantial group of French Canadians who were leaving the Province of Quebec for the New England states to escape British rule.
Gagnon envisaged a national union of French Canadians, whether in Canada or the United States.
His vocation was publishing and journalism, and he was involved in a number of publications, starting with La Voix du peuple.
In 1869 Gagnon married and settled in Worcester, Massachusetts, where he started the L’Étendard national.