| First Letter | County | Population | Municipality | % Correct |
|---|---|---|---|---|
| C | Cook | 2,611,867 | Chicago | 100%
|
| J | Will | 150,647 | Joliet | 91%
|
| N | DuPage | 150,795 | Naperville | 91%
|
| S | Sangamon | 111,374 | Springfield | 91%
|
| A | Kane | 175,795 | Aurora | 82%
|
| P | Peoria | 108,870 | Peoria | 82%
|
| E | Cook | 112,438 | Elgin | 73%
|
| Q | Adams | 38,398 | Quincy | 73%
|
| R | Winnebago | 144,420 | Rockford | 73%
|
| U | Champaign | 38,196 | Urbana | 73%
|
| D | Macon | 67,165 | Decatur | 64%
|
| K | Kankakee | 23,168 | Kankakee | 64%
|
| B | McLean | 78,521 | Bloomington | 55%
|
| W | Lake | 86,657 | Waukegan | 55%
|
| Z | Lake | 23,926 | Zion | 45%
|
| O | Cook | 56,094 | Orland Park | 36%
|
| T | Cook | 52,594 | Tinley Park | 36%
|
| X | Clay | 366 | Xenia | 36%
|
| F | Stephenson | 22,629 | Freeport | 27%
|
| G | Cook | 45,811 | Glenview | 27%
|
| H | Cook | 48,711 | Hoffman Estates | 27%
|
| V | Lake | 26,579 | Vernon Hills | 27%
|
| L | DuPage | 43,369 | Lombard | 18%
|
| M | Cook | 52,701 | Mount Prospect | 18%
|
| Y | Kendall | 26,701 | Yorkville | 18%
|
| I | DuPage | 9,228 | Itasca | 9%
|