Clarence Alphonse Gagnon, R.C.A., (8 November 1881 – 5 January 1942) was a French Canadian painter, draughtsman, engraver and illustrator, from the province of Quebec. He is well known for his landscape paintings of the Laurentians and the Charlevoix region of eastern Quebec.
Clarence Alphonse Gagnon was born in Montreal on November 8, 1881. He was the son of Alphonse E. Gagnon, a milling manager, and a cultured English mother, who was interested in literature. Part of his childhood was spent in Sainte Rose, a village north on Montreal. Early in life, his mother had encouraged him to learn drawing and painting, but his father wanted him to become a businessman.
He studied with William Bremner at the Art Association of Montreal in 1897. Desiring to improve his knowledge about art, he went to the Académie Julian in Paris, and studied under Jean-Paul Laurens from 1904 to 1905. Before returning to Canada in 1909, Gagnon spent time painting in France and Italy