HM Prison Gloucester
| Old entrance to HM Prison Gloucester in 2013 | |
| Location | Gloucester, Gloucestershire | 
|---|---|
| Status | Closed | 
| Security class | Adult Male/Category B | 
| Population | 323 (as of January 2005) | 
| Opened | 1791 | 
| Closed | 2013 | 
| Managed by | HM Prison Services | 
HM Prison Gloucester was a Category B men's prison located in Gloucester, Gloucestershire, England. It was originally opened in 1792, on the site of Gloucester Castle whose keep had been used as a prison.
The prison was operated by Her Majesty's Prison Service and closed in 2013.