Alex Johnston (born 14 January 1995), also known by the nickname of "AJ", is a professional rugby league footballer who plays as a fullback and winger for the South Sydney Rabbitohs in the NRL. He has played for both Australia and Papua New Guinea at international level.
Johnston was born in Sydney, New South Wales, Australia, and is of Indigenous Australian and Papua New Guinean descent.
He played for the Indigenous All Stars and the Prime Minister's XIII, and won the 2014 NRL Grand Final with the Rabbitohs.