Stephen Nissenbaum (A.B. Harvard College, 1961; M.A. Columbia University, 1963; Ph.D., University of Wisconsin–Madison, 1968 ), is an American scholar, a Professor Emeritus of the University of Massachusetts at Amherst's History Department specializing in early American history through to the nineteenth century. Most notably, he co-authored a book with Paul Boyer in 1974 about the Salem witch trials, Salem Possessed: The Social Origins of Witchcraft, called "a landmark in early American studies" by John Putnam Demos.