The Carnew Massacre was the summary execution of 38 prisoners being held as suspected United Irishmen by the local garrison in the British army barracks base of Carnew Castle, Carnew, County Wicklow, Ireland on 25 May 1798. News of the summary executions, together with news of a similar massacre at Dunlavin, spread throughout County Wicklow and across the border into County Wexford, giving substance to the rumours of widespread killing already prevalent. On 7 June, the town was burned and sacked in a revenge raid by Wexford rebels, led by Anthony Perry.