The 2015 Australian Formula 3 Championship was an Australian motor racing competition for cars constructed in accordance with FIA Formula 3 regulations. It was sanctioned by the Confederation of Australian Motor Sport (CAMS) as a national championship, with Formula 3 Management Pty Ltd appointed as the Category Manager. The Championship began on 27 March at Sandown Raceway and ended on 18 October at Wakefield Park after seven rounds across three states. The title, which was the 15th Australian Formula 3 Championship, was won by Gilmour Racing's Jon Collins by 1 point over Ricky Capo after both were excluded from the final race of the year.