Janesville, WI ZIP Codes, Coordinates & Counties
Janesville, Wisconsin has 3 ZIP codes in Rock county. The approximate center of Janesville is 42.691, -89.04. Janesville has about 385,207 known street addresses.
ZIP codes in Janesville, WI
| ZIP Code | County | Latitude | Longitude |
|---|---|---|---|
| 53545 | Rock | 42.736 | -89.041 |
| 53546 | Rock | 42.653 | -88.949 |
| 53548 | Rock | 42.685 | -89.129 |
Counties Janesville spans
Rock
Most common streets in Janesville
Milwaukee, Washington, River, Milton, Grant, Memorial, Lexington, Center, Myrtle, State
Frequently asked questions
What ZIP codes are in Janesville, WI?
Janesville, Wisconsin has 3 ZIP codes, ranging from 53545 to 53548. The full list, with each ZIP's county and coordinates, is in the table on this page.
What county is Janesville, WI in?
Janesville is in Rock county.
What are the latitude and longitude of Janesville, WI?
The approximate center of Janesville, Wisconsin is latitude 42.691, longitude -89.04. Coordinates for each ZIP code are listed in the table above.
How many ZIP codes does Janesville, WI have?
Janesville has 3 ZIP codes.
How many addresses are in Janesville, WI?
Janesville, Wisconsin has about 385,207 known street addresses in the sthan.io US address database.
What are the most common streets in Janesville, WI?
Some of the most common street names in Janesville are Milwaukee, Washington, River, Milton, Grant, Memorial.
What cities are near Janesville, WI?
Cities near Janesville include Afton (6 mi), Footville (9 mi), Milton (9 mi), Beloit (10 mi), Edgerton (11 mi).
Cities near Janesville
Afton, WI (6 mi) Footville, WI (9 mi) Milton, WI (9 mi) Beloit, WI (10 mi) Edgerton, WI (11 mi) Orfordville, WI (11 mi) Avalon, WI (11 mi) Evansville, WI (12 mi)
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View the API →Last updated: June 2026 · Data: sthan.io US address database