Adolphe Gagnon (May 20, 1810 – August 28, 1885) was a merchant and political figure in Quebec.
He was born in Baie-Saint-Paul, Quebec, the son of Louis-Joseph Gagnon and Marguerite Durette, (a.k.a.
Gagnon was a justice of the peace and a lieutenant in the militia for Charlevoix County.
Gagnon was married twice: to Ursule Garneau in 1833 and to Adelphine Huot in 1855.
His daughter Justine married Henry Simard who later served in the House of Commons.