7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 61074 | Savanna | 4,093 |
| 61053 | Mount Carroll | 2,839 |
| 61285 | Thomson | 2,661 |
| 61046 | Lanark | 2,659 |
| 61051 | Milledgeville | 1,549 |
| 61078 | Shannon | 1,255 |
| 61014 | Chadwick | 1,064 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Carroll County, Illinois (US Census).