100 Smallest ZIP Codes in the United States by Population in Jefferson County, Wisconsin
Explore the 100 smallest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in Jefferson County, Wisconsin.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 53137 | HELENVILLE | WI | 1,490 |
| 2 | 53178 | SULLIVAN | WI | 2,749 |
| 3 | 53036 | IXONIA | WI | 3,140 |
| 4 | 53156 | PALMYRA | WI | 3,433 |
| 5 | 53038 | JOHNSON CREEK | WI | 4,323 |
| 6 | 53594 | WATERLOO | WI | 5,059 |
| 7 | 53551 | LAKE MILLS | WI | 9,417 |
| 8 | 53549 | JEFFERSON | WI | 9,902 |
| 9 | 53094 | WATERTOWN | WI | 18,507 |
| 10 | 53538 | FORT ATKINSON | WI | 18,535 |