Peter Thacher (1752–1802) was a Congregationalist minister in Massachusetts in the 18th century. He served as pastor in Malden of the First Church (1770–1784) and in Boston of the Brattle Street Church (1785–1802). He actively supported the American Revolution. He participated in the drafting of the Massachusetts Constitution in 1780. In 1794, he was elected a Fellow of the American Academy of Arts and Sciences. He belonged to the Massachusetts Historical Society and Massachusetts Humane Society. He was educated at Harvard College, 1765–1769. On October 8, 1770, he married Elizabeth Poole (Hawkes); they had ten children.
- WorldCat. Thacher, Peter 1752–1802
- Manual of the First Church, Malden, Mass. May, 1878. Boston: Beacon Press, T. Todd, printer., 1878
- For example as a young man in 1772 he "went to the Old South meeting & heard Mr. Warren pronounce an oration in commemoration of the massacre perpetrated this day 2 years ago." (Diary of Rev. Peter Thacher. Register of the Malden Historical Society, no.1, 1910-1911)
- Peter Thacher. "Oration Delivered at Watertown, March 5, 1776." Boston Orations. Boston: Peter Edes, 1785. Reprinted in: Hezekiah Niles (1876), Centennial offering, Republication of the Principles and acts of the revolution in America, New York: A. S. Barnes & co.
- "Book of Members, 1780–2010: Chapter T". American Academy of Arts and Sciences. Retrieved July 28, 2014.
- William Emerson (1803), A sermon on the decease of the Rev. Peter Thacher, Boston: Printed by Young and Minns
- "Memoirs of the Rev. Dr. Thacher." Collections of the Massachusetts Historical Society, v.8. Boston: Munroe & Francis, 1802.