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Race results: Iowa Speedway
| Pos | Num | Driver | C/E/T | Race time/Split | Pit stops | Status | Grid pos |
| 1 | 5 | James Hinchcliffe | D/H/F | 1:47:32.4666 | 3 | Running | 11 |
| 2 | 21 | Spencer Pigot | D/C/F | +2.6491 | 3 | Running | 18 |
| 3 | 30 | Takuma Sato | D/H/F | +3.2506 | 3 | Running | 10 |
| 4 | 1 | Josef Newgarden | D/C/F | +4.5296 | 4 | Running | 2 |
| 5 | 6 | Robert Wickens (R) | D/H/F | +6.3214 | 4 | Running | 7 |
| 6 | 12 | Will Power | D/C/F | +1 lap | 3 | Running | 1 |
| 7 | 15 | Graham Rahal | D/H/F | +1 lap | 4 | Running | 12 |
| 8 | 22 | Simon Pagenaud | D/C/F | +1 lap | 4 | Running | 4 |
| 9 | 27 | Alexander Rossi | D/H/F | +2 laps | 4 | Running | 5 |
| 10 | 20 | Ed Carpenter | D/C/F | +2 laps | 4 | Running | 9 |
| 11 | 18 | Sebastien Bourdais | D/H/F | +3 laps | 3 | Running | 15 |
| 12 | 9 | Scott Dixon | D/H/F | +4 laps | 4 | Running | 6 |
| 13 | 10 | Ed Jones | D/H/F | +5 laps | 5 | Running | 8 |
| 14 | 23 | Charlie Kimball | D/C/F | +5 laps | 3 | Running | 17 |
| 15 | 59 | Max Chilton | D/C/F | +6 laps | 5 | Running | 21 |
| 16 | 98 | Marco Andretti | D/H/F | +7 laps | 4 | Running | 19 |
| 17 | 14 | Tony Kanaan | D/C/F | +8 laps | 4 | Running | 13 |
| 18 | 19 | Zachary Claman DeMelo (R) | D/H/F | +9 laps | 6 | Running | 20 |
| 19 | 28 | Ryan Hunter-Reay | D/H/F | +17 laps | 6 | Mechanical | 3 |
| 20 | 26 | Zach Veach (R) | D/H/F | +21 laps | 5 | Running | 14 |
| 21 | 88 | Gabby Chaves | D/C/F | +201 laps | 1 | Handling | 16 |
| 22 | 4 | Matheus Leist (R) | D/C/F | +260 laps | 0 | Mechanical | 22 |
(C)hassis: D=Dallara | (E)ngine: C=Chevy, H=Honda | (T)yre: F=Firestone
