Mary Hewes Hinckley (6 April 1845—5 June 1944)[1][2] was an American herpetologist, who made important contributions to the study of frogs in North America.

[2] She was cremated and her ashes scattered at the grave of her stepmother, Elizabeth Bass Estey (1824–1909), in the family's plot at Milton Cemetery.

[2] These have been described by C. Kenneth Dodd Jr. as "highly original with a large amount of detail", even in comparison to other field observations of the period.

[1] They named her as one of those who "in addition to serving the public and science generously, have in the last half-century contributed most notably to the study" of herpetology.

She should be acknowledged as an important early contributor to North American herpetology, specifically in regard to the study of the life history and ecology of frogs.