The Australia–South Korea football rivalry or the Australia–South Korea soccer rivalry is an association football rivalry between the Australia men's national soccer team (the Socceroos) and the South Korea national football team, as well as between the Australia women's national soccer team (the Matildas) and the South Korea women's national football team.
The reason for the rivalry is due to Australia and South Korea being two of the "Big Four" nations in the Asian Football Confederation (AFC), the other two being Japan and Saudi Arabia. These are the four most successful Asian countries in international soccer.