The 2003 Delphi Indy 300 was Round 14 of the 2003 IndyCar Series. The event was held at Chicagoland Speedway in Illinois, United States on 7 September 2003. Richie Hearn started on pole position and Sam Hornish Jr. was the race winner.
DELPHI INDY 300 Race Result
| Pos. | No. | Driver | Chassis | Engine | Tire | Started | Laps | Total Time | Laps Led | Status | Points | Avg. Speed | Pit Stops |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | Sam Hornish Jr. | Dallara | Chevrolet | Firestone | 8 | 200 | - | 40 | Running | 50 | 184.294 | - |
| 2 | 9 | Scott Dixon | G-Force | Toyota | Firestone | 5 | 200 | - | 1 | Running | 40 | - | - |
| 3 | 27 | Bryan Herta | Dallara | Honda | Firestone | 7 | 200 | - | 9 | Running | 35 | - | - |
| 4 | 26 | Dan Wheldon | Dallara | Honda | Firestone | 10 | 200 | - | 32 | Running | 32 | - | - |
| 5 | 10 | Tomas Scheckter | G-Force | Toyota | Firestone | 2 | 200 | - | 76 | Running | 32 | - | - |
| 6 | 11 | Tony Kanaan | Dallara | Honda | Firestone | 14 | 200 | - | 0 | Running | 28 | - | - |
| 7 | 52 | Alex Barron | Dallara | Chevrolet | Firestone | 13 | 200 | - | 0 | Running | 26 | - | - |
| 8 | 55 | Roger Yasukawa | Dallara | Honda | Firestone | 18 | 200 | - | 0 | Running | 24 | - | - |
| 9 | 12 | Tora Takagi | G-Force | Toyota | Firestone | 11 | 200 | - | 0 | Running | 22 | - | - |
| 10 | 24 | Robbie Buhl | Dallara | Chevrolet | Firestone | 6 | 200 | - | 0 | Running | 20 | - | - |
| 11 | 8 | Scott Sharp | Dallara | Toyota | Firestone | 20 | 200 | - | 0 | Running | 19 | - | - |
| 12 | 6 | Gil de Ferran | Dallara | Toyota | Firestone | 12 | 200 | - | 0 | Running | 18 | - | - |
| 13 | 18 | Ed Carpenter | Dallara | Chevrolet | Firestone | 16 | 200 | - | 0 | Running | 17 | - | - |
| 14 | 2 | Richie Hearn | Dallara | Chevrolet | Firestone | 1 | 199 | - | 37 | Running | 16 | - | - |
| 15 | 21 | Felipe Giaffone | G-Force | Toyota | Firestone | 3 | 199 | - | 1 | Running | 15 | - | - |
| 16 | 91 | Buddy Lazier | Dallara | Chevrolet | Firestone | 19 | 199 | - | 4 | Running | 14 | - | - |
| 17 | 14 | A.J. Foyt IV | Dallara | Toyota | Firestone | 21 | 199 | - | 0 | Running | 13 | - | - |
| 18 | 23 | Sarah Fisher | Dallara | Chevrolet | Firestone | 15 | 198 | - | 0 | Running | 12 | - | - |
| 19 | 31 | Al Unser Jr. | Dallara | Toyota | Firestone | 17 | 198 | - | 0 | Running | 11 | - | - |
| 20 | 3 | Helio Castroneves | Dallara | Toyota | Firestone | 9 | 183 | - | 0 | Gear Box | 10 | - | - |
| 21 | 15 | Kenny Brack | Dallara | Honda | Firestone | 4 | 119 | - | 0 | Accident | 9 | - | - |
| 22 | 13 | Greg Ray | G-Force | Honda | Firestone | 22 | 0 | - | 0 | DNS | 8 | - | - |