| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 61401 | Galesburg | Knox County | Standard |
| 61402 | Galesburg | Knox County | PO Box |
| 61410 | Abingdon | Knox County | Standard |
| 61414 | Altona | Knox County | Standard |
| 61428 | Dahinda | Knox County | Standard |
| 61430 | East Galesburg | Knox County | Standard |
| 61434 | Galva | Henry County | Standard |
| 61436 | Gilson | Knox County | Standard |
| 61439 | Henderson | Knox County | PO Box |
| 61448 | Knoxville | Knox County | Standard |
| 61449 | La Fayette | Stark County | Standard |
| 61458 | Maquon | Knox County | Standard |
| 61467 | Oneida | Knox County | Standard |
| 61472 | Rio | Knox County | Standard |
| 61474 | Saint Augustine | Knox County | Standard |
| 61485 | Victoria | Knox County | Standard |
| 61488 | Wataga | Knox County | Standard |
| 61489 | Williamsfield | Knox County | Standard |
| 61529 | Elmwood | Peoria County | Standard |
| 61544 | London Mills | Fulton County | Standard |
| 61572 | Yates City | Knox County | Standard |