Ebenezer Weaver Peirce (April 10, 1822 – August 14, 1902), was a brigadier general in the Massachusetts militia, serving as 90–day volunteers in the Union Army in the opening months of the American Civil War, and a colonel of the 29th Massachusetts Volunteer Infantry Regiment of the Union Army between December 1861 and July 1864.

Peirce enlisted in the 4th Artillery, Massachusetts Volunteer Militia, in 1843, and continued his service up to and including the Civil War.

Serving under Major General Benjamin F. Butler at Fort Monroe in Virginia, he was in direct command of the Union forces at the Battle of Big Bethel in June, 1861.

[2] Peirce was discharged from the volunteer service on November 4, 1864 due to the loss of his right arm and general nervous debility relating to miasmatic diseases,[2] and returned to Assonet.

In 1867, the E. W. Peirce Encampment, Post 8, Grand Army of the Republic was established in Middleborough, Massachusetts and named for Ebenezer W.

[7] Peirce was an author of numerous books and articles on historical subjects in Bristol and Plymouth counties, including Indian History, Biography and Genealogy: Pertaining to the Good Sachem Massasoit of the Wampanoag Tribe, and His Descendants, which was published in 1878 by Zerviah Gould Mitchell, a descendant of Sachem Massasoit.