Massachusetts Anti-Slavery Society
The Massachusetts Anti-Slavery Society was organized as an auxiliary of the American Anti-Slavery Society in 1835. Its roots were in New England Anti-Slavery Society, organized by William Lloyd Garrison, editor of The Liberator, in 1831. Garrison went on to organize a national organization, the American Anti-Slavery Society, in 1833.
 New England Anti-Slavery Society
Based in Boston, Massachusetts, members of the New England Anti-slavery Society supported immediate abolition and viewed slavery as immoral and non-Christian. It was particularly opposed to the American Colonization Society which proposed sending African Americans to Africa.
The Society sponsored lecturers or "agents" who traveled throughout the New England area, speaking in local churches or halls, and also selling abolitionist tracts or The Liberator. Whenever possible, the Society's agents would also encourage the formation of local anti-slavery societies. By 1833 there were 47 local societies in ten northern states, 33 of them in New England. The Society also sponsored mass mobilizations such as yearly anti-slavery conventions and celebrations of July 4 or the Anniversary of the Abolition of Slavery in the West Indies, August 1.
 Massachusetts General Colored Association
In January 1833, Thomas Dalton, president of the Massachusetts General Colored Association, led a successful petition to merge with the New England Anti-Slavery Society. Separate black anti-slavery societies had already existed in Massachusetts, New York, Ohio, Connecticut, and New Jersey, however, a strong feeling against the organization of separate anti-slavery societies had been emerging.
Together they organized Anti-Slavery conventions and speaking programs throughout New England.
Sometime after Joshua Easton was sent as a delegate to the New England society in 1833, African Americans were granted full membership in the organization.
 American Anti-Slavery Society
In 1833, Garrison and Arthur Tappan expanded this society and formed the American Anti-Slavery Society. The American Anti-Slavery Society, however, attempted to create state-based organizations under the umbrella of its Executive Committee. At first the New England Anti-Slavery Society and the American Society worked together with the New England Society becoming an auxiliary in 1834.
 Massachusetts Anti-Slavery Society
In 1835, however, the New England Society gave up its regional jurisdiction and reorganized into the Massachusetts Anti-Slavery Society.
Following the Civil War the Massachusetts Anti-Slavery Society took up the cause of racial equality.
 See also
- Massachusetts General Colored Association, which joined the New England Anti-Slavery Society in 1833
- World Anti-Slavery Convention of 1840
- William Lloyd Garrison (1833). The Abolitionist. New England Anti-Slavery Society. p. 20. Retrieved 23 April 2013.
- Cromwell (1994). The Other Brahmins: Boston's Black Upper Class, 1750-1950. University of Arkansas Press. p. 39. ISBN 978-1-61075-293-0. Retrieved 23 April 2013.
- Zorn, Roman J.,The New England Anti-Slavery Society: Pioneer Abolition Organization, The Journal of Negro History, Vol. 42, No. 3 (Jul., 1957), pp. 157-176
- "Massachusetts Anti-Slavery Society--Thirty-Sixth Anniversary." (pdf). New York Times. January 28, 1870. Retrieved 2009-08-12.