| 61410 Abingdon | 309 | Knox County | Illinois (IL) |
| 61414 Altona | 309 | Knox County | Illinois (IL) |
| 61428 Appleton | 309 | Knox County | Illinois (IL) |
| 61430 Columbia Heights | 309 | Knox County | Illinois (IL) |
| 61428 Dahinda | 309 | Knox County | Illinois (IL) |
| 61436 Delong | 309 | Knox County | Illinois (IL) |
| 61430 East Galesburg | 309 | Knox County | Illinois (IL) |
| 61401 Galesburg | 309 | Knox County | Illinois (IL) |
| 61402 Galesburg | 309 | Knox County | Illinois (IL) |
| 61436 Gilson | 309 | Knox County | Illinois (IL) |
| 61439 Henderson | 309 | Knox County | Illinois (IL) |
| 61401 Henderson Grove | 309 | Knox County | Illinois (IL) |
| 61458 Hermon | 309 | Knox County | Illinois (IL) |
| 61448 Knoxville | 309 | Knox County | Illinois (IL) |
| 61458 Maquon | 309 | Knox County | Illinois (IL) |
| 61428 Oak Run | 309 | Knox County | Illinois (IL) |
| 61467 Oneida | 309 | Knox County | Illinois (IL) |
| 61472 Rio | 309 | Knox County | Illinois (IL) |
| 61474 Saint Augustine | 309 | Knox County | Illinois (IL) |
| 61485 Victoria | 309 | Knox County | Illinois (IL) |
| 61488 Wataga | 309 | Knox County | Illinois (IL) |
| 61489 Williamsfield | 309 | Knox County | Illinois (IL) |
| 61572 Yates City | 309 | Knox County | Illinois (IL) |