1990 Australian Drivers' Championship
The 1990 Australian Drivers' Championship was an Australian motor racing title sanctioned by the Confederation of Australian Motor Sport and open to Formula Holden racing cars. It was the 34th Australian Drivers' Championship and the second to be contested by Formula Holden cars. The championship winner was awarded the CAMS Gold Star.
The championship was won by Simon Kane driving a Ralt RT21.
Calendar
The championship was contested over eight rounds with one race per round.| Round | Race name | Circuit | State | Date | Winning driver | Winning car |
| 1 | Phillip Island | Victoria | 25 March | Simon Kane | Ralt RT21 | |
| 2 | Winton | Victoria | 8 April | John Briggs | Ralt RT21 | |
| 3 | Amaroo Park | New South Wales | 27 May | Mark Poole | Shrike 003 | |
| 4 | ACL Trophy | Mallala | South Australia | 10 June | Mark Skaife | SPA |
| 5 | Oran Park | New South Wales | 19 August | Mark Skaife | SPA | |
| 6 | Sandown | Victoria | 9 September | Mark Poole | Shrike 003 | |
| 7 | Winton | Victoria | 7 October | Simon Kane | Ralt RT21 | |
| 8 | Thalgo Trophy | Adelaide | South Australia | 3 November | Neil Crompton | Ralt RT20 |
Teams and drivers
The following teams and drivers competed in the 1990 Australian Drivers' Championship.| Team | Car | No | Driver |
| Skaife Racing P/L | Spa FB001 | 3 |  Mark Skaife |
| FAPM | Ralt RT20 | 4 | Roger Martin |
| Clive Kane Photography | Ralt RT21 | 5 | Simon Kane |
| Richard Davison | Ralt RT20 | 6 | Richard Davison |
| Boylan Racing | Ralt RT20 | 7 | Neil Crompton |
| John Briggs | Ralt RT21 | 9 | John Briggs |
| Thalgo Racing Team | Spa FB002 | 11 | Tony Blanche Mark McLaughlin |
| Thalgo Racing Team | Ralt RT21 | 12 | Mark Larkham Tony Blanche |
| TAFE Team Motorsport | Shrike NB89H | 21 | Mark Poole |
| TAFE Team Motorsport | Shrike NB89H | Wayne Gardner | |
| David Mawer | Ralt RT21 | 27 | John Smith |
| Hocking Motorsport | Hocking 901 | 38 | Sam Astuti Roger Martin |
| Hocking Motorsport | March 87B | 73 | Mark McLaughlin Domenic Beninca Chris Hocking |
| Tenth Corporation P/L | Ralt RT20 | 39 | Drew Price |
| Ralt RT4 | Paul Collins | ||
| Ray Cutchie | Ralt RT4 | Ray Cutchie Brian Sampson | |
| John Hermann | Liston BF3 | John Herrman | |
| Mark Potter | Ralt RT4 | Mark Potter |