In which county is ZIP code 53548 located?

ZIP 53548 is listed under Rock County, WI.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 53548: Janesville, WI

ZIP: 53548

County: Rock County

Coordinates: 42.68540, -89.12870

ZIP Type: Standard

Time Zone: Central Time (CT)

Get a reliable snapshot of the Janesville, WI postal area 53548. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Janesville
ZIP Code	53548
County	Rock County
State	WI
Latitude / Longitude	42.68540, -89.12870
ZIP Type	Standard
Time Zone	Central Time (CT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 53548 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 53548 is approximately 42.68540 (latitude) and -89.12870 (longitude). This location sits within Rock County, contributing to regional planning across WI.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 53548 for mail delivery and general location reference in Rock County, WI.

Some addresses near Janesville may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Janesville within WI.

Frequently Asked Questions

What is the primary city for ZIP code 53548?

The primary city for this ZIP code is Janesville, located in WI.

In which county is 53548 located?

ZIP code 53548 is situated within Rock County, WI.

What are the coordinates for 53548?

The approximate center point is 42.68540 (Latitude) and -89.12870 (Longitude).

Is ZIP code 53548 active?

This page lists ZIP 53548 as Listed based on the latest refresh date shown above.

Does ZIP 53548 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08