Joseph John Bossano (born 10 June 1939) is a Gibraltarian politician, and the former leader of the Gibraltar Socialist Labour Party. He was Chief Minister of Gibraltar from 25 March 1988 to 17 May 1996. He served as the Leader of the Opposition in the Gibraltar House of Assembly from 1984 until 1988 and again from 1996 until April 2011, by when the House of Assembly had become the Gibraltar Parliament.