The 1973 Australian Formula 2 Championship was a CAMS sanctioned motor racing title open to Australian Formula 2 racing cars.[1] It was the seventh Australian Formula 2 Championship to be awarded by CAMS.[2]
The championship was dominated by multiple-championship winning driver Leo Geoghegan, who scored a perfect 54 points from six round wins over the course of the season.
The championship was contested over a seven-round series with one race per round.[3]
| Round | Circuit | State | Date |
| 1 | Hume Weir | Victoria | 3-Jun |
| 2 | Oran Park | New South Wales | 5 August |
| 3 | Amaroo Park | New South Wales | 19 August |
| 4 | Surfers Paradise | Queensland | 2 September |
| 5 | Symmons Plains | Tasmania | 23 September |
| 6 | Adelaide International Raceway | South Australia | 7 October |
| 7 | Calder | Victoria | 21-Oct |
Championship points were awarded on a 9-6-4-3-2-1 basis to the first six eligible finishers at each round.[1] Only holders of a General Competition License issued by CAMS were eligible for points and each driver could retain points only from his/her best six round results.[1]
| Position | Driver | Car | Entrant | Hume Wr | Oran Pk | Amaroo | Surfers | Symmons | AIR | Calder | Total |
| 1 | Leo Geoghegan | Birrana 272 Ford Birrana 273 Ford |
Grace Bros - 5AD City State Racing Team | 9 | 9 | 9 | 9 | 9 | (6) | 9 | 54 |
| 2 | Enno Busselmann | Birrana 273 Ford | Bob & Marj Brown | - | - | - | 4 | 1 | 9 | 6 | 20 |
| 3 | Bob Skelton | Bowin P6 Ford | Finnie Ford Miranda | - | 4 | 6 | 1 | 6 | - | - | 17 |
| 4 | Chris Farrell | Dolphin 732 Ford | Chris Farrell | - | 1 | 3 | 3 | 3 | 4 | - | 14 |
| 5 | Bruce Allison | Bowin P6 Ford | Hobby and Toyland Racing | - | - | - | 6 | 4 | - | - | 10 |
| = | Ray Winter | Mildren Mono Ford | - | 2 | 4 | - | - | - | 4 | 10 | |
| 7 | Tony Stewart | Birrana 273 Ford | 6 | 3 | - | - | - | - | - | 9 | |
| 8 | Peter Brock | Birrana 273 Ford | Team Brock | - | 6 | 1 | - | - | - | - | 7 |
| 9 | Chas Talbot | Elfin 600E Ford | 4 | - | - | - | - | - | - | 4 | |
| = | Bob Johns | Lotus 59 Ford | 2 | - | - | 2 | - | - | - | 4 | |
| = | Ian Ferguson | Bowin P3a Ford | - | - | 2 | - | 2 | - | - | 4 | |
| 12 | Bob Holden | Brabham BT36 Ford | 3 | - | - | - | - | - | - | 3 | |
| = | Paul Hamilton | Elfin 600 Ford | - | - | - | - | - | - | 3 | 3 | |
| 14 | Mike Stillwell | Elfin 622 Ford | 1 | - | - | - | - | - | - | 1 |
