County · GEOID 55105
Rock County, WI ZIP codes
20 ZIP/ZCTAs intersecting this county.
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: County Rock County (GEOID 55105). Methodology
Combined population of ZIP/ZCTAs intersecting this county: 239,227 (20 ZIPs).
Combined population of ZIP/ZCTAs intersecting this county. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census county ACS headline above. Methodology
ZIP/ZCTA overlap with Rock County
Population overlap
Share of each ZIP/ZCTA’s population located within Rock County, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- 531148.0%
- 531906.1%
- 53501100.0%
Directory county
- 535020.6%
- 53505100.0%
Directory county
- 53511100.0%
Directory county
- 5352017.9%
- 535217.0%
- 5352598.4%
Directory county
- 5353480.6%
Directory county
- 53536100.0%
Directory county
- 53537100.0%
Directory county
- 535380.7%
- 53545100.0%
Directory county
- 53546100.0%
Directory county
- 53548100.0%
Directory county
- 5356399.0%
Directory county
- 53576100.0%
Directory county
- 535851.5%
- 535890.2%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
ZIP codes intersecting Rock County
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 53114 | Darien | Walworth County | 2,153 | $73,906 |
| 53190 | Whitewater | Walworth County | 20,461 | $59,598 |
| 53501 | Afton | Rock County | 147 | — |
| 53502 | Albany | Green County | 2,420 | $87,768 |
| 53505 | Avalon | Rock County | 370 | $96,667 |
| 53511 | Beloit | Rock County | 48,305 | $65,305 |
| 53520 | Brodhead | Green County | 6,758 | $74,589 |
| 53521 | Brooklyn | Dane County | 3,688 | $101,731 |
| 53525 | Clinton | Rock County | 4,083 | $72,991 |
| 53534 | Edgerton | Rock County | 12,344 | $94,250 |
| 53536 | Evansville | Rock County | 9,449 | $83,944 |
| 53537 | Footville | Rock County | 818 | $56,375 |
| 53538 | Fort Atkinson | Jefferson County | 18,604 | $80,784 |
| 53545 | Janesville | Rock County | 23,937 | $70,730 |
| 53546 | Janesville | Rock County | 29,482 | $73,430 |
| 53548 | Janesville | Rock County | 20,509 | $74,696 |
| 53563 | Milton | Rock County | 11,468 | $89,397 |
| 53576 | Orfordville | Rock County | 2,309 | $72,917 |
| 53585 | Sharon | Walworth County | 2,238 | $71,683 |
| 53589 | Stoughton | Dane County | 19,684 | $93,509 |
USPS associates these ZIPs with Rock County
These codes list Rock County as a primary or acceptable city. They are not used for the ACS headline.
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 53512 | Beloit | Rock County | 481 | — |
| 53542 | Hanover | Rock County | 106 | — |
| 53547 | Janesville | Rock County | 903 | — |