2003 Catalan motorcycle Grand Prix
The 2003 Catalan motorcycle Grand Prix was the sixth round of the 2003 MotoGP Championship. It took place on the weekend of 13–15 June 2003 at the Circuit de Catalunya located in Montmeló, Catalonia, Spain.250 cc classification
125 cc classification
Championship standings after the race (motoGP)
Below are the standings for the top five riders and constructors after round six has concluded.
;Riders' Championship standings
;Constructors' Championship standings
| Constructor | Points |
| 1 |  Honda | 145 |
| 2 |  Ducati | 90 |
| 3 | Yamaha | 70 |
| 4 | Aprilia | 34 |
| 5 |  / Proton Team KR | 21 |
- Note: Only the top five positions are included for both sets of standings.
Sete Gibernau
Alex Barros