14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 61032 | Freeport | 29,359 |
| 61048 | Lena | 3,851 |
| 61019 | Davis | 3,256 |
| 61062 | Pearl City | 2,015 |
| 61060 | Orangeville | 1,482 |
| 61070 | Rock City | 1,389 |
| 61018 | Dakota | 953 |
| 61039 | German Valley | 829 |
| 61013 | Cedarville | 621 |
| 61067 | Ridott | 604 |
| 61089 | Winslow | 575 |
| 61050 | McConnell | 357 |
| 61044 | Kent | 235 |
| 61027 | Eleroy | 102 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Stephenson County, Illinois (US Census).