2015 Australian GT Championship
The 2015 Australian GT Championship was a CAMS sanctioned Australian motor racing championship open to FIA GT3 cars and similar cars as approved for the championship. The Australian GT Sportscar Group Pty Ltd was appointed by CAMS as the Category Manager for the championship. The title, which was the 19th Australian GT Championship, was won by Christopher Mies, driving an Audi R8 Ultra.
Race calendar
The championship was contested over six rounds.| Rnd | Circuit | Date | Pole Position | Fastest Lap | Winning Driver | Winning Vehicle |
| 1 | Adelaide Street Circuit | 28 February |  Jono Lester | Jono Lester |  Nathan Antunes | Audi R8 Ultra |
| 1 | Adelaide Street Circuit | 28 February |  Christopher Mies Greg Crick | Nathan Antunes | Audi R8 Ultra | |
| 1 | Adelaide Street Circuit | 1 March | Christopher Mies | Tony Quinn | McLaren MP4-12C | |
| 2 | Phillip Island Grand Prix Circuit | 22–23 May | Jono Lester Graeme Smyth | Christopher Mies Greg Crick | Christopher Mies Greg Crick | Audi R8 Ultra |
| 3 | Townsville Street Circuit | 11 July | Jono Lester | Christopher Mies Greg Crick | Tony D'Alberto Grant Denyer | Ferrari 458 Italia |
| 3 | Townsville Street Circuit | 12 July | Christopher Mies Greg Crick | Nathan Antunes | Audi R8 Ultra | |
| 4 | Sydney Motorsport Park | 22 August | Steve Owen Kevin Weeks | Matt Campbell | Christopher Mies Ryan Millier | Audi R8 Ultra |
| 4 | Sydney Motorsport Park | 23 August | Christopher Mies Ryan Millier | Grant Denyer | Ferrari 458 Italia | |
| 5 | Sandown International Raceway | 12 September | Jono Lester | Morgan Haber | Tony D'Alberto Grant Denyer | Ferrari 458 Italia |
| 5 | Sandown International Raceway | 13 September | Jono Lester Graeme Smyth | Christopher Mies Ryan Millier | Audi R8 Ultra | |
| 6 | Highlands Motorsport Park | 14 November | Christopher Hasse Steve McLaughlan | Klark Quinn Shane van Gisbergen | Klark Quinn Shane van Gisbergen | McLaren 650S GT3 |
| 6 | Highlands Motorsport Park | 15 November | Klark Quinn Shane van Gisbergen | Morgan Haber | Mercedes-Benz SLS AMG GT3 |
Divisions
Drivers' titles were awarded in four divisions.- GT Championship - for FIA GT3 specification vehicles
- GT Trophy - for older specification FIA GT3 vehicles
- GT Challenge - for cars that no longer fitted within the GT Championship and GT Trophy divisions
- GT Sports - for GT4 specification cars
Championship standings
- The driver gaining the highest points total over all rounds of the Championship, within their division, was declared the winner of that division.
- If two drivers competed in the same automobile for all, or the majority of the rounds, then the final division position was awarded to both drivers.
2015 Australian Tourist Trophy