Alan Joseph Adamson (August 1, 1857 – April 4, 1928) was a Canadian politician. Born in Clifden, County Galway, Ireland, the son of John Evans Adamson and Harietta Bell, he was educated in Dublin and came to western Canada in 1873. He married Julia Turriff, who was the sister of John Gillanders Turriff, in 1882. In 1883, Adamson moved to Winnipeg and became involved in the grain trade. In 1899, he went to Rosthern, Saskatchewan, where he established the Canadian Territories Corporation, which became one of the largest land agencies in western Canada and also operated as a private bank; Adamson served as its president and manager. He was also a director of the Northern Bank and of the Saskatchewan Valley and Manitoba Land Company and president of the Western Trust Company.