Walter Deane (April 23, 1848 – July 30, 1930) was an American amateur botanist and ornithologist.

Born in Boston, Massachusetts, he graduated from Harvard College in 1870.

He was a founding member of the New England Botanical Club and served as its president from 1908 to 1911.

[1][2] From 1897 to 1907 he was curator of William Brewster's ornithological museum, and prepared Brewster's Birds of the Cambridge Region.

Deane is commemorated in the plant genus Deanea Coulter & Rose.