William Jackson Bean (26 May 1863, Yorkshire – 19 April 1947, Kew, Surrey) was a British botanist and plantsman, who was curator of Kew Gardens from 1922 to 1929. He was responsible for some of the present collections of trees and woody plants there.
He wrote the first two-volume edition of the reference work Trees and Shrubs Hardy in the British Isles, which was published in 1914. A revised four-volume edition of this work remains a standard reference work for woody plants grown in Britain today.