HM Prison Barwon or informally Barwon Prison, an Australian high risk and maximum security prison for males, is located 6 kilometres (3.7 mi) from the township of Lara, near Geelong, Victoria, Australia. The facility is operated by Corrections Victoria. The prison provides accommodation and services for remand and sentenced prisoners detained under Victorian and Federal legislation.

A super-maximum security (supermax) or administrative maximum (ADX) prison is a "control-unit" prison, or a unit within prisons, which represents the most secure level of custody in the prison systems of certain countries.