County · Wisconsin · United States
Rock County ZIP codes
12 ZIP codes · 10 cities · FIPS 55105
Key facts
- State
- Wisconsin (WI)
- FIPS code
- 55105
- Population
- 163,944
- Median household income
- $74,390
- Median age
- 40.1
- Land area
- 718.2 sq mi (1,860 km²)
- Population density
- 228 / sq mi
- Area codes
- 262, 608
Cities and ZIP codes in Rock County (10)
| City | ZIP codes |
|---|---|
| Janesville | 53545, 53546, 53548 |
| Afton | 53501 |
| Avalon | 53505 |
| Beloit | 53511 |
| Clinton | 53525 |
| Edgerton | 53534 |
| Evansville | 53536 |
| Footville | 53537 |
| Milton | 53563 |
| Orfordville | 53576 |
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.