Mary H. Graves (September 12, 1839 – December 5, 1908) was an American Unitarian minister, literary editor, and writer of the long nineteenth century.

She was ordained by James Freeman Clarke as a Unitarian minister, and passed years in several pastorates, the earliest of which was at Mansfield, Massachusetts.

As the years wore on, her strength proved unequal to the arduous duties of the ministry, and her time was filled with literary work.

When his sudden death from apoplexy, January 2, 1872, was announced, that evening at the Farmers’ Club a spontaneous tribute was paid to his memory in the general utterance, "He was an honest man.” His father was Capt.

Her generous teaching included cultivating the imagination and the finer qualities of the mind through drawing, and reading, and botany.

In the summer of 1869, she supplied the pulpit of the Universalist church in North Reading, and during the fall and winter, while studying in Bridgeport, Connecticut, preached in New Haven and other places in that State.

A large council, representing many different churches convened for this purpose, took unusual care in examining the action of the parish and the preparation of the candidate.

[4] Graves' health was never vigorous, and this affected her ability for continuous pastoral work after her placement in Mansfield.

[4] However, in 1882, she had pastoral charge of the Unitarian Society in Baraboo, Wisconsin, and she managed some missionary work in the West, mainly in Illinois and adjoining States.