| Letter | Population | City | % Correct |
|---|---|---|---|
| C | 9,552,941 | Chicago | 100%
|
| S | 160,301 | Springfield | 93%
|
| J | 280,056 | Joliet | 91%
|
| N | 408,135 | Naperville | 89%
|
| P | 163,261 | Peoria | 84%
|
| R | 311,096 | Rockford | 84%
|
| A | 366,092 | Aurora | 75%
|
| C | 158,080 | Champaign | 61%
|
| E | 127,015 | Elgin | 61%
|
| W | 386,403 | Waukegan | 50%
|
| B | 138,874 | Bloomington | 45%
|
| D | 101,812 | Decatur | 43%
|
| R-I | 130,128 | Rock Island | 39%
|
| B | 141,986 | Belleville | 18%
|
| C-L | 125,668 | Crystal Lake | 14%
|