The Argus finals systems were related systems of end-of-season playoff tournaments used commonly in Australian sports competitions in the first half of the 20th century. The systems were first developed in Australian rules football competitions in 1902, and were used broadly across Australia into the 1950s.
There were several variations, but the systems were characterised by a tournament among the highest ranked teams, followed by the right of the first seed to another match to challenge for the premiership if it had not won the tournament.
After 1931, the Argus systems increasingly came into competition with the Page playoff system, which eventually replaced it as the country's pre-eminent four-team finals system.