The 2004 Australian Under-21 Individual Speedway Championship was the 18th running of the Australian Under-21 Individual Speedway Championship organised by Motorcycling Australia. The final took place on 31 January 2004 at the Undera Park Speedway in Undera, Victoria. The championship was won by defending champion, Adelaide's Rory Schlein. Robert Ksiezak from Adelaide was second with another South Australian, Matt Wethers, in third place.
| width=25px | Pos. | Rider | width=40px | Points | width=70px | Details |
|---|---|---|---|---|---|---|
| Rory Schlein | 15 | (3,3,3,3,3) | ||||
| Robert Ksiezak | 12 | (2,3,3,3,1) | ||||
| Matt Wethers | 12 | (3,2,2,2,3) | ||||
| 4 | Trevor Harding | 11+3 | (2,2,3,2,2+3) | |||
| 5 | Mark Jones | 11+2 | (x,3,3,3,2+2) | |||
| 6 | Cameron Woodward | 8 | (3,1,2,2,x) | |||
| 7 | James Holder | 8 | (2,1,1,1,3) | |||
| 8 | Cory Gathercole | 8 | (1,3,1,2,1) | |||
| 9 | Tyron Proctor | 7 | (0,2,2,1,2) | |||
| 10 | Michael Slade | 7 | (1,2,1,1,2) | |||
| 11 | Arlo Bugeja | 6 | (2,0,1,0,3) | |||
| 12 | John Oliver | 5 | (nc,f,2,3,f) | |||
| 13 | Chris Holder | 4 | (3,0,0,0,1) | |||
| 14 | Brock Gates | 3 | (1,1,0,1,0) | |||
| 15 | Louis Myers | 2 | (1,1,f,f,ns) | |||
| 16 | Sam Dore | 0 | (nc,f,0,0,0) | |||
| 17 | Matt Windsor (Res) | 0 | (-,-,-,-,nc) | |||
| 18 | Paul Boganowicz (Res) | 0 | Did not ride |
1 Rory Schlein
2 Robert Ksiezak
3 Matt Wethers
4 Trevor Harding