Janesville, WI ZIP codes
Janesville, Wisconsin has 4 ZIP codes, including 1 PO Box ZIP. They are in Rock County.
- Population in these ZIPs
- 74,486
- Avg. median income
- $75,500population-weighted
- Typical home value
- $301,200population-weighted
- Metro area
- Janesville-Beloit, WI
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Janesville, WI ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 53545 | Rock County | 24,703 | $73,889 | $285,500 |
| 53546 | Rock County | 29,867 | $75,825 | $324,000 |
| 53547 PO Box | Rock County | — | — | — |
| 53548 | Rock County | 19,916 | $76,869 | $286,500 |
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
Cities near Janesville
- Afton 7 mi
- Milton 8 mi
- Footville 9 mi
- Orfordville 11 mi
- Edgerton 11 mi
- Avalon 11 mi
- Beloit 12 mi
- Evansville 12 mi
- Clinton 15 mi
- Darien 16 mi
- Fort Atkinson 17 mi
- Whitewater 17 mi
Frequently asked questions
What is the ZIP code for Janesville, WI?
Janesville, WI has 4 ZIP codes: 53545, 53546, 53547 and 53548.
What county is Janesville, Wisconsin in?
Janesville ZIP codes are in Rock County.
Which Janesville ZIP codes are PO Boxes?
53547 is a PO Box or single-organization ZIP code; it has no residential delivery area.