Her Majesty's Prison Maze (previously Long Kesh Detention Centre and known colloquially as the Maze Prison, The Maze, the H Blocks or Long Kesh) was a prison in Northern Ireland that was used to house paramilitary prisoners during the Troubles from mid-1971 to mid-2000.

It was situated at the former Royal Air Force station of Long Kesh, on the outskirts of Lisburn. This was in the townland of Maze, about nine miles (14 km) southwest of Belfast. The prison and its inmates were involved in such events as the 1981 hunger strike. The prison was closed in 2000 and demolition began on 30 October 2006, but on 18 April 2013 it was announced by the Northern Ireland Executive that the remaining buildings would be redeveloped into a peace centre.

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