John Bernard "Jack" Mackey VC (16 May 1922 – 12 May 1945) was an Australian recipient of the Victoria Cross, the highest award for gallantry in the face of the enemy that can be awarded to British Commonwealth forces. Mackey was one of twenty Australians to receive the award for actions during the Second World War, receiving his award posthumously for leading an attack on against a strongly defended Japanese position during the Battle of Tarkan in May 1945.