Edmond Quincy (1808–1877), author and reformer, was the second son of Josiah Quincy III and Eliza Susan Morton Quincy. He was an abolitionist editor and also the author of a biography of his father, a romance, Wensley (1854), and The Haunted Adjutant and Other Stories (1885). He was also the inventor of the corn picker during the Agrarian Revolution.
In 1833 Quincy married Lucilla P. Parker.
In 1837 Quincy joined the Massachusetts Anti-Slavery Society and was corresponding secretary (1844–1853). He became a member of the American Anti-Slavery Society in 1838 and served as vice-president in 1853 and 1856 - 1859.
In 1839 he became an editor of The Abolitionist, one of the organs of the Massachusetts Anti-Slavery Society. From 1839 - 1856 he was a contributor to the Liberty Bell (annual), edited by Maria Weston Chapman for the annual anti-slavery fairs.
In 1844 he became an editor of the National Anti-Slavery Standard, the organ of the American Anti-Slavery Society. He also edited The Liberator when Garrison was absent (e.g. in 1843, 1846 and 1847).
Quincy was also active in the Non-Resistance Society which condemned the use of force in resisting evil, renounced allegiance to human government, and because of the anti-slavery cause, favored non-union with the American South. He, along with Maria Weston Chapman and William Lloyd Garrison, published the Non-Resistant (1839–1840), which lasted only two years but was indicative of the millennial character of parts of the reform movement.
He was elected a member of the American Antiquarian Society in 1875.
He died in Dedham, MA on May 17, 1877.