14 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 61032 | Freeport | 29,020 |
| 61048 | Lena | 3,786 |
| 61019 | Davis | 3,461 |
| 61062 | Pearl City | 1,840 |
| 61060 | Orangeville | 1,554 |
| 61070 | Rock City | 1,322 |
| 61018 | Dakota | 1,034 |
| 61039 | German Valley | 824 |
| 61013 | Cedarville | 690 |
| 61089 | Winslow | 526 |
| 61067 | Ridott | 450 |
| 61044 | Kent | 225 |
| 61050 | McConnell | 199 |
| 61027 | Eleroy | 33 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 14 ZCTAs in Stephenson County, Illinois (US Census).