HMP Belfast, also known as Crumlin Road Gaol, is a former prison situated on the Crumlin Road in north Belfast, Northern Ireland. It is the only Victorian era prison remaining in Northern Ireland since 1996. It is affectionately known as the Crum.
The Northern Ireland Environment Agency has given it a grade A listed building status because of its architectural and historical significance. The Crumlin Road Courthouse, which is currently derelict, stands opposite the Gaol. A tunnel under the main road connects the two buildings and was used to transport the prisoners to the courthouse.