Alex or Alexander Jackson may refer to:
A. Y. Jackson (1882-1974), Canadian painter and founding member of the Group of Seven,
Alex Jackson (footballer born 1905) (died 1946), Scottish footballer,
Alex Jackson (footballer born 1935) , Scottish footballer,
Alexandra Jackson (b. 1952), Irish swimmer,
Alexander Jackson (sport shooter), British sport shooter who competed in the men's free rifle at 300 metres at the 1908 Summer Olympics,
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