Mary Blanchard Lynde (December 4, 1819 – June 26, 1897) was an American philanthropist and social reformer, active in all of the progressive women's movements in Wisconsin.

[3] She was educated principally in the Albany Female Academy, where she was graduated in 1839, taking the first prize medal for composition, which was presented by the governor of the State, Hon.

[4] She was appointed a member of the Wisconsin State Board of Charities and Reforms, while Governor Lucius Fairchild was in office.

She read papers in the meetings of the Association for the Advancement of Women in Chicago and Boston, and her ideas were so practical and forcible as to attract unusual attention.

Lynde would go on to become a prominent lawyer and politician in Wisconsin, served three terms in the United States House of Representatives, and was the 12th mayor of Milwaukee.