John Hamilton "Jack" Bush (20 March 1909 – 24 January 1977) was a Canadian contemporary, abstract painter.
His paintings are associated with the Color Field movement and Post-painterly Abstraction.
Inspired by the master of Fauvism, Henri Matisse and other American abstract expressionist painters like Helen Frankenthaler and Morris Louis, Bush encapsulated joyful yet emotional feelings in his vibrant paintings.