List of all Chicago 20 races held in AAA National Motor Car Championship championships
| Race | Winner | Track | Race Start | |
|---|---|---|---|---|
 |
1917 Chicago 20 |
Greg Moore Reynard 97I |
Maywood Speedway | 13th October 1917 |
|
1918 Chicago 20 |
Kenny Brack Dallara IR7 |
Maywood Speedway | 28th July 1918 |