Rock County, Wisconsin ZIP Codes
- ZIP records
13 - Cities represented
11 - Sum of listed ZIP population estimates
170,414
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 | 53511 | Beloit | 48,701 |
| 2 | 53546 | Janesville | 29,867 |
| 3 | 53545 | Janesville | 24,703 |
| 4 | 53548 | Janesville | 19,916 |
| 5 | 53534 | Edgerton | 12,241 |
| 6 | 53563 | Milton | 11,280 |
| 7 | 53536 | Evansville | 9,547 |
| 8 | 53520 | Brodhead | 6,687 |
| 9 | 53525 | Clinton | 4,066 |
| 10 | 53576 | Orfordville | 2,131 |
Cities in Rock County
ZIP Directory
- ZIP 53501
- ZIP 53505
- ZIP 53511
- ZIP 53520
- ZIP 53525
- ZIP 53534
- ZIP 53536
- ZIP 53537
- ZIP 53545
- ZIP 53546
- ZIP 53548
- ZIP 53563
- ZIP 53576
Browse all ZIP data for Wisconsin
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.