| Zip Code | City | Population ↓ |
|---|---|---|
| 61021 | Dixon | 22,593 |
| 61310 | Amboy | 3,556 |
| 61031 | Franklin Grove | 1,745 |
| 61006 | Ashton | 1,460 |
| 61353 | Paw Paw | 1,238 |
| 61367 | Sublette | 902 |
| 60530 | Lee | 901 |
| 60553 | Steward | 666 |
| 61318 | Compton | 620 |
| 61378 | West Brooklyn | 493 |
| 61042 | Harmon | 428 |
| 61324 | Eldena | 85 |
| 61057 | Nachusa | 67 |
| 61331 | Lee Center | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Lee County, Illinois (US Census).