1998 Australian motorcycle Grand Prix
The 1998 Australian motorcycle Grand Prix was the thirteenth round of the 1998 Grand Prix motorcycle racing season. It took place on 4 October 1998 at the Phillip Island Grand Prix Circuit.
Championship standings after the race (500cc)
Below are the standings for the top five riders and constructors after round thirteen has concluded.;Riders' Championship standings
| Rider | Points | |
| 1 |  |