ZIP CodesZIP codes in Jefferson County, Wisconsin
Jefferson County, Wisconsin has 10 ZIP codes in this list, from 53036 to 53594. They cover 10 places, among them Ixonia, Johnson Creek, Watertown and Helenville.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 53036 | Ixonia | 28.6 | 43.148, -88.589 |
| 53038 | Johnson Creek | 30.9 | 43.075, -88.784 |
| 53094 | Watertown | 88.8 | 43.193, -88.719 |
| 53137 | Helenville | 33.2 | 43.009, -88.673 |
| 53156 | Palmyra | 30.8 | 42.879, -88.590 |
| 53178 | Sullivan | 31.9 | 42.998, -88.603 |
| 53538 | Fort Atkinson | 97.1 | 42.923, -88.847 |
| 53549 | Jefferson | 71.1 | 43.001, -88.808 |
| 53551 | Lake Mills | 39.6 | 43.082, -88.913 |
| 53594 | Waterloo | 72.8 | 43.183, -88.984 |
The ZIP code areas of Jefferson County add up to about 525 square miles of land (1,359 sq km) as the Census Bureau draws them. The largest is 53538 (Fort Atkinson), with 97.1 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Ixonia, WI 53036.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.