The 2003 Australian Under-21 Individual Speedway Championahip was the 17th running of the Australian Under-21 Individual Speedway Championship organised by Motorcycling Australia. The final was held at the Oakburn Park Speedway in Tamworth, New South Wales.
1 Rory Schlein (
)
2 Cameron Woodward (
)
3 Jaye Stevens (
)
4 Scott James