HM Prison Pentridge was an Australian prison built in 1850 in Coburg, Victoria. The first prisoners arrived in 1851. The prison was closed on 1 May 1997.
Pentridge was often known by the nicknames "The Bluestone College", "Coburg College" or the "College of Knowledge". The grounds were originally landscaped by renowned landscape gardener Hugh Linaker. Since closing, much of the prison has been pulled down to make way for a housing development. Large buildings have been built and a 16 floor modern apartment block is being planned.
The northern section of the prison being developed by Valad Property Group and the other areas by Pentridge Village. The National Trust does not like the development plans approved by Heritage Victoria. These plans include taking down sections of the outside walls and building apartments between the historic prison buildings.