The Old Melbourne Gaol is a former jail and current museum on Russell Street, in Melbourne, Victoria, Australia. It consists of a bluestone building and courtyard, and is located next to the old City Police Watch House and City Courts buildings, and opposite the Russell Street Police Headquarters. It was first constructed starting in 1839, and during its operation as a prison between 1845 and 1924, it held and executed some of Australia's most notorious criminals, including bushranger Ned Kelly and serial killer Frederick Bailey Deeming. In total, 133 people were executed by hanging. Though it was used briefly during World War II, it formally ceased operating as a prison in 1924; with parts of the jail being incorporated into the RMIT University, and the rest becoming a museum.

Russell Street is a main street and thoroughfare in the Melbourne central business district, Victoria, Australia. It runs roughly north-south and was laid out as a core feature of the Hoddle Grid in 1837.