Amos William Butler (1 October 1860 – 5 August 1937) was an American naturalist.

[1] Starting in 1877, Butler attended Hanover College.

He then went on to attend Indiana University Bloomington, where he was a member of Phi Beta Kappa[1] and Sigma Xi, an honorary scientific fraternity.

[3] Butler founded several organizations, including the Brookville Society of Natural History in 1881 and the Indiana Academy of Science in 1885.

[4] He was also a member of several other organizations, including the American Ornithologists' Union, Wilson Ornithological Club, the Biological Society of Washington, the Cincinnati Society of Natural History, and the Nature Study Club of Indiana.