Beloit, WI ZIP Codes
Beloit, Wisconsin has 2 ZIP codes: for street addresses and for PO boxes.
Mail addressed to Beloit covers nearby places too.
Where the 53511 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
53512 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Beloit city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Beloit
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Beloit PO box and business ZIP codes
| ZIP | Type and post office or station |
|---|---|
| 53511 | street delivery Beloit |
| 53512 | PO boxes at the Beloit post office Beloit |
Why your mail may say Beloit when you live outside it
Beloit ZIP codes also cover Newark, Turtle and Rock, so a letter addressed to Beloit can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Rock County property records show which city you are in.
Beloit ZIP code questions
What is the main ZIP code for Beloit?
53511, the ZIP code of the main Beloit post office at 300 Mill St.
Which Beloit ZIP codes are for PO boxes only?
53512. Mail to it goes to boxes at the post office, not to street addresses.
What county is Beloit in?
Rock County.
ZIP codes for towns near Beloit
More towns near Beloit: Madison, Carpentersville, Sun Prairie, Elgin, Waukesha, Mundelein, New Berlin, Hoffman Estates, St. Charles.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections