Results: Grand Prix of Sonoma
| Pos | Driver | Grid | C/A/E/T | Laps | Race time, gap | Laps led | Status | Pit stops |
| 1 | Simon Pagenaud | 3 | D/C/C/F | 85 | 1:55:52.6840 | 41 | Running | 4 |
| 2 | Josef Newgarden | 1 | D/C/C/F | 85 | +1.0986 | 41 | Running | 3 |
| 3 | Will Power | 2 | D/C/C/F | 85 | +1.6139 | – | Running | 3 |
| 4 | Scott Dixon | 6 | D/H/H/F | 85 | +12.0870 | – | Running | 3 |
| 5 | Helio Castroneves | 4 | D/C/C/F | 85 | +22.5022 | – | Running | 3 |
| 6 | Graham Rahal | 9 | D/H/H/F | 85 | +23.5289 | – | Running | 3 |
| 7 | Marco Andretti | 11 | D/H/H/F | 85 | +23.9788 | – | Running | 3 |
| 8 | Ryan Hunter-Reay | 7 | D/H/H/F | 85 | +24.5140 | – | Running | 3 |
| 9 | Sebastien Bourdais | 10 | D/H/H/F | 85 | +49.9911 | – | Running | 3 |
| 10 | Conor Daly | 13 | D/C/C/F | 85 | +55.6650 | 3 | Running | 3 |
| 11 | Charlie Kimball | 15 | D/H/H/F | 85 | +1:21.0203 | – | Running | 4 |
| 12 | Max Chilton | 14 | D/H/H/F | 85 | +1:24.5038 | – | Running | 3 |
| 13 | Spencer Pigot | 17 | D/C/C/F | 84 | +1 lap | – | Running | 4 |
| 14 | JR Hildebrand | 20 | D/C/C/F | 84 | +1 lap | – | Running | 4 |
| 15 | Carlos Muñoz | 22 | D/C/C/F | 84 | +1 lap | – | Running | 3 |
| 16 | Tony Kanaan | 12 | D/H/H/F | 84 | +1 lap | – | Running | 5 |
| 17 | Zachary Claman DeMelo (R) | 21 | D/H/H/F | 84 | +1 lap | – | Running | 4 |
| 18 | Jack Harvey (R) | 19 | D/H/H/F | 84 | +1 lap | – | Running | 4 |
| 19 | Ed Jones (R) | 18 | D/H/H/F | 69 | +16 laps | – | Off Course | 4 |
| 20 | Takuma Sato | 5 | D/H/H/F | 62 | +23 laps | – | Off Course | 3 |
| 21 | Alexander Rossi | 8 | D/H/H/F | 60 | +25 laps | – | Running | 4 |
| 22 | James Hinchcliffe | 16 | D/H/H/F | 52 | +33 laps | – | Electrical | 3 |
(C)hassis: D=Dallara | (A)erokit: C=Chevy, H=Honda | (E)ngine: C=Chevy, H=Honda | (T)yre: F=Firestone
