Jefferson County, Wisconsin ZIP Codes
- ZIP records
10 - Cities represented
10 - Sum of listed ZIP population estimates
76,915
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 | 53538 | Fort Atkinson | 18,813 |
| 2 | 53094 | Watertown | 17,998 |
| 3 | 53549 | Jefferson | 9,873 |
| 4 | 53551 | Lake Mills | 9,731 |
| 5 | 53594 | Waterloo | 5,199 |
| 6 | 53038 | Johnson Creek | 4,192 |
| 7 | 53036 | Ixonia | 3,730 |
| 8 | 53156 | Palmyra | 3,232 |
| 9 | 53178 | Sullivan | 2,497 |
| 10 | 53137 | Helenville | 1,650 |
Cities in Jefferson County
ZIP Directory
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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.