| Letter | Population | Illinois City | % Correct |
|---|---|---|---|
| C | 2,716,450 | Chicago | 99%
|
| A | 200,965 | Aurora | 90%
|
| S | 114,868 | Springfield | 81%
|
| P | 112,883 | Peoria | 80%
|
| R | 147,051 | Rockford | 79%
|
| J | 148,462 | Joliet | 77%
|
| N | 147,682 | Naperville | 76%
|
| E | 112,456 | Elgin | 68%
|
| B | 77,934 | Bloomington | 63%
|
| W | 87,729 | Waukegan | 57%
|
| D | 72,174 | Decatur | 55%
|
| Q | 40,303 | Quincy | 52%
|
| U | 41,989 | Urbana | 49%
|
| Z | 23,952 | Zion | 44%
|
| K | 26,216 | Kankakee | 39%
|
| O | 58,765 | Orland Park | 32%
|
| T | 56,668 | Tinley Park | 27%
|
| X | 375 | Xenia | 21%
|
| H | 51,567 | Hoffman Estates | 19%
|
| F | 24,091 | Freeport | 17%
|
| G | 47,659 | Glenview | 17%
|
| L | 43,745 | Lombard | 13%
|
| V | 26,253 | Vernon Hills | 13%
|
| I | 9,416 | Itasca | 12%
|
| M | 53,930 | Mount Prospect | 11%
|
| Y | 19,388 | Yorkville | 9%
|