Augustus Hemenway (1853–1931) was a philanthropist and public servant in Boston, Massachusetts, in the latter part of the 19th century.

His siblings were Edith Hemenway Eustis (1851-1904), Charlotte Augusta (d. 1865), Alice, (d. in infancy), and Amy.

[1] In 1878, he donated the Hemenway Gymnasium to Harvard and expanded it in 1895; he also served as an overseer of the university.

He supported a number of other institutions in the Boston area, including the Museum of Fine Arts, Massachusetts Eye and Ear Infirmary, Groton School, Metropolitan Park Commission, and MIT.

[2] Upon his death in 1931, it was said of him: "In the various interests ... thrust upon him he never failed to do his full share in attending to the work at hand.