Jack Dempsey (born 12 April 1994) is an Australian rugby union player of Scottish descent who currently plays for the Wallabies as well as Waratahs in the international Super Rugby competition.
Domestically he is contracted to the North Harbour Rays who compete in the National Rugby Championship.
His regular playing position is either as a flanker or number eight.
Dempsey has represented Australia at schoolboy and under-20 level.
He was capped for Australia against Italy, coming off the bench at Lang Park in Brisbane on 24 June 2017.
Dempsey was a member of the Wallabies 2019 Rugby World Cup squad which were knocked out in the Quarter Finals in Japan.