Engraving depicting the trial of a witch at Salem, Massachusetts.

The Salem witch trials were a series of hearings and prosecutions of people accused of witchcraft in colonial Massachusetts between February 1692 and May 1693. The trials resulted in the executions of twenty people, fourteen of them women, and all but one by hanging. Five others (including two infant children) died in prison.

Twelve other women had previously been executed in Massachusetts and Connecticut during the 17th century. Despite being generally known as the Salem Witch Trials, the preliminary hearings in 1692 were conducted in several towns: Salem Village (now Danvers), Salem Town, Ipswich, and Andover. The most infamous trials were conducted by the Court of Oyer and Terminer in 1692 in Salem Town.

The episode is one of Colonial America's most notorious cases of mass hysteria. It has been used in political rhetoric and popular literature as a vivid cautionary tale about the dangers of isolationism, religious extremism, false accusations, and lapses in due process. It was not unique, but a Colonial American example of the much broader phenomenon of witch trials in the early modern period, which took place also in Europe. Many historians consider the lasting effects of the trials to have been highly influential in subsequent United States history. According to historian George Lincoln Burr, "the Salem witchcraft was the rock on which the theocracy shattered."