Janesville-Beloit, WI metro area ZIP codes
The Janesville-Beloit, WI metropolitan statistical area (CBSA 27500) covers 1 county in Wisconsin and 16 ZIP codes.
- ZIP codes
- 16
- Population
- 170,414
- Avg. median income
- $75,600population-weighted
- Counties
- 1
Click anywhere on the map to see which ZIP code it's in.
Counties in the Janesville-Beloit, WI area
ZIP codes in the Janesville-Beloit, WI area
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 53501 | Afton | Rock County | 165 | — | — |
| 53505 | Avalon | Rock County | 358 | $91,500 | $392,000 |
| 53511 | Beloit | Rock County | 48,701 | $67,067 | $219,500 |
| 53512 PO Box | Beloit | Rock County | — | — | — |
| 53520 | Brodhead | Rock County | 6,687 | $75,205 | $314,000 |
| 53525 | Clinton | Rock County | 4,066 | $79,323 | $324,700 |
| 53534 | Edgerton | Rock County | 12,241 | $89,045 | $353,000 |
| 53536 | Evansville | Rock County | 9,547 | $87,667 | $388,600 |
| 53537 | Footville | Rock County | 752 | $59,821 | $258,700 |
| 53542 PO Box | Hanover | Rock County | — | — | — |
| 53545 | Janesville | Rock County | 24,703 | $73,889 | $285,500 |
| 53546 | Janesville | Rock County | 29,867 | $75,825 | $324,000 |
| 53547 PO Box | Janesville | Rock County | — | — | — |
| 53548 | Janesville | Rock County | 19,916 | $76,869 | $286,500 |
| 53563 | Milton | Rock County | 11,280 | $89,528 | $383,100 |
| 53576 | Orfordville | Rock County | 2,131 | $63,750 | $313,100 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Frequently asked questions
How many ZIP codes are in the Janesville-Beloit, WI metro area?
16 ZIP codes, based on each ZIP code's main county.
Which counties make up the Janesville-Beloit, WI area?
Rock County.
What is an MSA?
A metropolitan statistical area (MSA) is a core city of 50,000+ people plus the surrounding counties tied to it by commuting, as defined by the U.S. Office of Management and Budget. Micropolitan areas have a core of 10,000–50,000. Together they are called core-based statistical areas (CBSAs).