HM Prison Northallerton was a prison in Northallerton, North Yorkshire, England. It operated from 1788 until December 2013. During that time, it variously housed male and female adult prisoners, women with children, youth offenders, and military prisoners. Latterly Her Majesty's Prison Service struggled to keep the old prison operating to modern standards, and citing the costs of doing so and the relatively small size of the institution, it closed the prison in 2014. The prison was bought by Hambleton District Council, which is currently redeveloping the site.