H.M. Gaol Hobart or Campbell Street Gaol, a former Australian maximum security prison for males and females, was located in Hobart, Tasmania. Built by convict labour, the gaol operated between 1821 until the early 1960s. In 1961, male inmates were transferred to the H.M. Risdon Prison and in 1963, female inmates were transferred to the Risdon Women's Prison. Designed in the Georgian Renaissance architectural style by John Lee Archer, what remains of the gaol is now managed by the National Trust of Australia (Tasmania) as a historic site.