It was the final season running the Dallara IR-05 spec cars, which had been the series' sole chassis supplier since 2007.
The race was abandoned after 12 completed laps and the final points total reverted to the previous event, with Franchitti winning the title.
Bertrand Baguette would shift his focus to sports cars for 2012, racing in the World Endurance Championship.
Tomas Scheckter made his final starts of his career across several teams in 2011 before moving to the United Kingdom.
Wheldon would sign a contract to race for Andretti Autosport for 2012 driving the number 27 car, replacing Danica Patrick, but the 2005 champion was killed in an accident at Las Vegas Motor Speedway.
1 At the Las Vegas Indy 300, Dan Wheldon died from injuries sustained in a 15-car crash on lap 11.
2 Simona de Silvestro was awarded with 5 points at Iowa as a 'non starter', but her withdrawal on medical grounds before the start of practice meant that she did not compete in any of the official sessions.