The 1985 Australian Touring Car Championship was a CAMS sanctioned motor racing title for drivers of Touring Cars. It was the 26th running of the Australian Touring Car Championship and the first to be contested using regulations based on the FIA's International Group A regulations after having been run under CAMS home grown Group C rules between 1973 and 1984. The championship began on 10 February 1985 at Winton Motor Raceway and ended on 14 July at Oran Park Raceway after ten rounds.

Oran Park Raceway was a motor racing circuit at Narellan south west of Sydney, New South Wales, Australia which was operational from February 1962 until its closure in January 2010. The track was designed and started by George Murray and Jack Allen. Since its closure in 2010 it has been (re)developed into housing.