Peter Dempsey
Birthplace: Dublin, Ireland
Born: March 31, 1986
Died:
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| Year | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles | Points | Standing |
| 2011 | 9 | 1 | 0 | 1 | 3 | 0 | 1 | 0 | 264 |
10 |
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| Total | 9 | 1 | 0 | 1 | 3 | 0 | 1 | 0 | 264 |
| Track Type | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Paved Oval | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 6 | 0 |
| Road Course | 3 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | |
| Street Course | 5 | 0 | 0 | 1 | 1 | 0 | 1 | 0 |
| Start # | Date | Track | Type | Car # | Sponsor/Name | Chassis | Engine | Start | Finish | Laps | Status | Points |
| 1 | 3/27/2011 | St. Petersburg | SC | 36 | Pulse | Dallara | Infiniti | 5 | 3 | 45 | 0:56:14.1388 86.422 | 35 |
| 2 | 4/10/2011 | Barber | RC | 36 | Pulse | Dallara | Infiniti | 8 | 3 | 40 | 1:00:22.9055 91.418 | 35 |
| 3 | 4/17/2011 | Long Beach | SC | 36 | Pulse | Dallara | Infiniti | 2 | 17 | 9 | Wrecked | 13 |
| 4 | 5/27/2011 | Indianapolis | PO | 36 | Pulse | Dallara | Infiniti | 6 | 6 | 40 | 0:55:42.1004 107.717 | 28 |
| -- | 6/19/2011 | Milwaukee | PO | 36 | Pulse | Dallara | Infiniti | -- | -- | -- | Withdrew after qualifying | 8 |
| 5 | 7/10/2011 | Toronto | SC | 26 | Andretti Autosport | Dallara | Infiniti | 3 | 2 | 49 | 1:01:02.6534 84.524 | 40 |
| 6 | 7/23/2011 | Edmonton 1 | RC | 26 | Andretti Autosport | Dallara | Infiniti | 3 | 12 | 27 | Wrecked | 18 |
| 7 | 7/24/2011 | Edmonton 2 | RC | 26 | Andretti Autosport | Dallara | Infiniti | 6 | 3 | 40 | 0:57:01.5879 93.599 | 35 |
| 8 | 8/7/2011 | Trois-Rivieres | SC | 26 | Andretti Autosport | Dallara | Infiniti | 3 | 5 | 58 | 1:13:57.5867 71.049 | 30 |
| 9 | 9/4/2011 | Baltimore | SC | 26 | Andretti Autosport | Dallara | Infiniti | 2 | 9 | 34 | Flagged | 22 |