City · Wisconsin · United States

Janesville, WI — ZIP codes

4 ZIP codes · Rock County

City: Janesville
County: Rock
State: Wisconsin
Country: United States
Postal codes: 53545535465354753548
Single source
Coordinates: 42.7355, -89.0405 View on OpenStreetMap

ZIP codes (4)

Postal code	Place name	Verification
53545	Janesville	Single source
53546	Janesville	Single source
53547	Janesville	Single source
53548	Janesville	Single source

Sources and verification

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames. Last generated : 2026-08-21. Report an error.