The 1968 Australian One and a Half Litre Championship was a CAMS sanctioned motor racing title for drivers of Australian 1ý Litre Formula racing cars. It was the fifth and final Australian One and a Half Litre Championship to be awarded prior to the demise of the formula at the end of 1968.
The title was contested over a six heat series, run concurrently with the 1968 Australian Drivers' Championship.
Championship points were awarded on a 9-6-4-3-2-1 basis to the drivers of the six best placed Australian 1ý Litre Formula cars at each heat. The best five results from the six heats could be retained by each driver.