| Category | Open Wheel Racing | 
|---|---|
| Country | Australia | 
| Inaugural season | 1964 | 
| Folded | 1968 | 
| Last Drivers' champion | Max Stewart Garrie Cooper | 
The Australian One and a Half Litre Championship was a CAMS sanctioned national motor racing title contested annually from 1964 to 1968. It was open to drivers of cars complying with the Australian 1½ Litre Formula which specified open wheel racing cars fitted with unsupercharged engines using commercially available fuel and limited to 1500cc capacity. The title was staged over a single race in the first two years and over a series of races in the last three.