Jefferson County, Iowa ZIP Codes
- ZIP records
7 - Cities represented
6 - Sum of listed ZIP population estimates
16,529
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 52556 | Fairfield | 11,448 |
| 2 | 52533 | Batavia | 1,201 |
| 3 | 52540 | Brighton | 1,088 |
| 4 | 52635 | Lockridge | 890 |
| 5 | 52580 | Packwood | 711 |
| 6 | 52557 | Fairfield | 685 |
| 7 | 52567 | Libertyville | 506 |
Cities in Jefferson County
ZIP Directory
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.