| Letter | Population | Answer | % Correct |
|---|---|---|---|
| C | 2,696,555 | Chicago | 100%
|
| S | 113,394 | Springfield | 93%
|
| J | 150,372 | Joliet | 85%
|
| P | 111,666 | Peoria | 81%
|
| A | 179,266 | Aurora | 74%
|
| N | 149,104 | Naperville | 74%
|
| Q | 39,131 | Quincy | 74%
|
| R | 147,711 | Rockford | 70%
|
| E | 113,911 | Elgin | 63%
|
| Z | 24,494 | Zion | 63%
|
| U | 38,681 | Urbana | 59%
|
| B | 78,283 | Bloomington | 52%
|
| D | 69,646 | Decatur | 52%
|
| W | 88,614 | Waukegan | 44%
|
| X | 375 | Xenia | 41%
|
| K | 23,922 | Kankakee | 26%
|
| O | 57,850 | Orland Park | 26%
|
| T | 54,864 | Tinley Park | 19%
|
| G | 47,856 | Glenview | 15%
|
| H | 51,350 | Hoffman Estates | 15%
|
| L | 43,891 | Lombard | 15%
|
| M | 55,541 | Mount Prospect | 15%
|
| F | 23,650 | Freeport | 11%
|
| I | 9,430 | Itasca | 11%
|
| Y | 22,594 | Yorkville | 11%
|
| V | 26,786 | Vernon Hills | 7%
|