This list of 2004 motorsport champions is a list of national or international auto racing series with a Championship decided by the points or positions earned by a driver from multiple races.
| Series | Driver | Season article |
|---|---|---|
| NASCAR Nextel Cup Series |  Kurt Busch | 2004 NASCAR Nextel Cup Series |
| Manufacturers: Chevrolet | ||
| NASCAR Busch Series | Martin Truex Jr. | 2004 NASCAR Busch Series |
| Manufacturers: Chevrolet | ||
| NASCAR Craftsman Truck Series | Bobby Hamilton | 2004 NASCAR Craftsman Truck Series |
| Manufacturers: Dodge | ||
| NASCAR Busch North Series | Andy Santerre | 2004 NASCAR Busch North Series |
| NASCAR West Series | Mike Duncan | 2004 NASCAR West Series |
| ARCA Re/Max Series | Frank Kimmel | 2004 ARCA Re/Max Series |
| ASCAR Days of Thunder |  Stevie Hodgson | 2004 Days of Thunder season |
| Desafío Corona |  Carlos Pardo | 2004 Desafío Corona season |
| Turismo Carretera |  Omar Martínez | 2004 Turismo Carretera |
| Series | Driver | Season article |
|---|---|---|
| European Truck Racing Championship | Super-Race-Trucks:  Markus Oestreich | 2004 European Truck Racing Championship |
| Race-Trucks: Stuart Oliver | ||
| Fórmula Truck |  Beto Monteiro | 2004 Fórmula Truck season |
| Teams: DF Motorsport | ||
| Manufacturers: Ford | ||
| V8 BRute Racing Series |  Damien White | 2004 V8 BRute Racing Series |
| Series | Driver/Co-Driver | Season article |
|---|---|---|
| World Rally Championship |  Sébastien Loeb | 2004 World Rally Championship |
Co-Drivers:  Daniel Elena | ||
| Manufacturer: Citroën | ||
| Junior World Rally Championship |  Per-Gunnar Andersson | |
| Production World Rally Championship | Niall McShea | |
| New Zealand Rally Championship |  Chris West | 2004 New Zealand Rally Championship |
| Co-Drivers: Garry Cowan | ||
| Series | Champion | Refer |
|---|---|---|
| NHRA Powerade Drag Racing Series | Top Fuel: Tony Schumacher | 2004 NHRA Powerade Drag Racing Series |
| Funny Car: John Force | ||
| Pro Stock: Greg Anderson | ||
| Pro Stock Motorcycle: Andrew Hines | ||
| Series | Champion | Refer |
|---|---|---|
| D1 Grand Prix |  Ryuji Miki | 2004 D1 Grand Prix season |
| D1NZ | Justin Rood | 2004 D1NZ season |
| D1UK/Autoglym Drift Championship | Brett Castle | 2004 D1UK/Autoglym Drift Championship |
| Formula D | Samuel Hübinette | 2004 Formula D season |
| Series | Driver | Season article |
|---|---|---|
| Karting World Championship | FA:  Davide Forè | |
| CIK-FIA Karting European Championship | FA: Nick de Bruijn | |
| S-ICC: Francesco Laudato | ||
| ICA: Kévin Estre | ||
| ICA-J: Stefano Coletti | ||
| Rotax Max Challenge | RM1: Wesleigh Orr | |
| MAX Masters: Sam Ghalleb | ||
| Junior: Benjamin Salvatore | ||
Rodrigo Gallego
Jürg Felix
Alf-Aslak Eng