The Attica Prison Riot, also known as the Attica Prison Rebellion, the Attica Uprising, or the Attica Prison Massacre, took place at the state prison in Attica, New York; it started on September 9, 1971, and ended on September 13 with the highest number of fatalities in the history of United States prison uprisings. Of the 43 men who died, all but one guard and three inmates were killed by law enforcement gunfire when the state retook control of the prison on the final day of the uprising. The Attica Uprising has been described as a historic event in the prisoners' rights movement.

Attica Correctional Facility is a maximum security campus New York State prison in the town of Attica, New York, operated by the New York State Department of Corrections and Community Supervision. It was constructed in the 1930s in response to earlier riots within the New York state prisons.