Mary Marshall Dyer (1780–1867) was a voice for the largely forgotten anti-Shakerism sentiment in rural New Hampshire, United States.

Disappointed in her lack of a leadership role and frustrated by the constraints of Shaker life, Dyer left the community in 1815.

Her principal writings included A Brief Statement of the Sufferings of Mary Dyer and A Portraiture of Shakerism in 1822.

In 1819, she attempted to raise a mob to storm the Enfield Shaker Community to take her children back, but this effort failed.

[1] Joseph Dyer remained devoted to the community and criticized her in strong terms, responding in print to his wife's published accusations.