14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 61032 | Freeport | 29,072 |
| 61048 | Lena | 3,848 |
| 61019 | Davis | 3,341 |
| 61062 | Pearl City | 1,881 |
| 61060 | Orangeville | 1,467 |
| 61070 | Rock City | 1,325 |
| 61018 | Dakota | 1,040 |
| 61039 | German Valley | 812 |
| 61013 | Cedarville | 705 |
| 61089 | Winslow | 593 |
| 61067 | Ridott | 496 |
| 61050 | McConnell | 284 |
| 61044 | Kent | 276 |
| 61027 | Eleroy | 43 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Stephenson County, Illinois (US Census).