Alexander Young Jackson (October 3, 1882 – April 5, 1974) was a Canadian painter and a founding member of the Group of Seven. Jackson made a significant contribution to the development of art in Canada, and was successful in bringing together the artists of Montreal and Toronto. He exhibited with the Group of Seven from 1920. In addition to his work with the Group of Seven, his long career included serving as a war artist during World War I (1917–19) and teaching at the Banff School of Fine Arts, from 1943 to 1949. In his later years he was artist-in-residence at the McMichael Gallery in Kleinberg, Ontario.