Janesville, Wisconsin ZIP Codes
- ZIP records
3 - Sum of listed ZIP population estimates
74,486 - Counties represented
1 - Population range
19,916–29,867 per ZIP
Population sum includes positive estimates in these ZIP records; it is not an official city population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | County | Population estimate |
|---|---|---|---|---|
| 1 | 53546 | Janesville | Rock | 29,867 |
| 2 | 53545 | Janesville | Rock | 24,703 |
| 3 | 53548 | Janesville | Rock | 19,916 |
Counties represented
All ZIP Codes in Janesville
Browse all ZIP data for Wisconsin
Methodology: ZIP records are grouped by the source file's primary city and state fields. Population ranges and sums use positive ZIP-level estimates; sums should not be read as official city totals. County links use each record's listed county assignment.