ZIP Code 53511 — Beloit, WI
53511 is a standard (street delivery) ZIP code serving Beloit, Wisconsin, in Rock County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 53511 at a glance
| ZIP code | 53511 |
|---|---|
| Primary city | Beloit |
| State | Wisconsin (WI) |
| County | Rock FIPS 55105 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 48,701 |
| Coordinates | 42.546270, -89.097920 |
How ZIP+4 works in 53511
The four digits after the hyphen encode a delivery segment inside 53511. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 53511 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 53511.
| ZIP | City | Distance |
|---|---|---|
| 53501 | Afton, WI | 4.3 mi |
| 61080 | South Beloit, IL | 7.1 mi |
| 61072 | Rockton, IL | 7.2 mi |
| 61079 | Shirland, IL | 8.9 mi |
| 53576 | Orfordville, WI | 9 mi |
| 61073 | Roscoe, IL | 9.9 mi |
| 53548 | Janesville, WI | 10 mi |
| 53537 | Footville, WI | 10.4 mi |
| 53546 | Janesville, WI | 10.5 mi |
| 61024 | Durand, IL | 12.4 mi |
| 53525 | Clinton, WI | 12.7 mi |
| 61115 | Machesney Park, IL | 13.1 mi |
Questions about 53511
What is the ZIP+4 code for 53511?
53511 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 53511, you need to look up a specific street address to get them.
What city is 53511?
53511 is assigned to Beloit, Wisconsin, in Rock County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.