The 1968 Australian One and a Half Litre Championship was a CAMS sanctioned motor racing title for drivers of Australian 1½ Litre Formula racing cars.^[1] It was the fifth and final Australian One and a Half Litre Championship to be awarded^[2] prior to the demise of the formula at the end of 1968.

The title was contested over a six heat series,^[3] run concurrently with the 1968 Australian Drivers' Championship.^[1]

• Heat 1, Bathurst Gold Star Trophy, Mount Panorama, Bathurst, New South Wales, 15 April^[4]
• Heat 2, Governor's Trophy, Lakeside, Queensland, 28 July^[5]
• Heat 3, Rothman's Trophy, Surfers Paradise, Queensland, 24 August^[6]
• Heat 4, Lombard (Aust.) Victoria Trophy, Sandown Park, Victoria, 15 September^[7][8]
• Heat 5, Advertiser Trophy, Mallala, South Australia, 14 October^[9][10]
• Heat 6, Hordern Trophy, Warwick Farm, New South Wales, 1 December^[11]

Championship points were awarded on a 9-6-4-3-2-1 basis to the drivers of the six best placed Australian 1½ Litre Formula cars at each heat. The best five results from the six heats could be retained by each driver.^[1]