ZIP Code 53521 — Brooklyn, WI
53521 is a standard (street delivery) ZIP code serving Brooklyn, Wisconsin, in Green 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 53521 at a glance
| ZIP code | 53521 |
|---|---|
| Primary city | Brooklyn |
| State | Wisconsin (WI) |
| County | Green FIPS 55045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 3,640 |
| Coordinates | 42.842170, -89.408140 |
How ZIP+4 works in 53521
The four digits after the hyphen encode a delivery segment inside 53521. 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 53521 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 53521.
| ZIP | City | Distance |
|---|---|---|
| 53575 | Oregon, WI | 6.3 mi |
| 53502 | Albany, WI | 7.8 mi |
| 53508 | Belleville, WI | 8 mi |
| 53536 | Evansville, WI | 8.8 mi |
| 53589 | Stoughton, WI | 11.5 mi |
| 53711 | Madison, WI | 11.9 mi |
| 53574 | New Glarus, WI | 12.4 mi |
| 53558 | Mcfarland, WI | 12.7 mi |
| 53570 | Monticello, WI | 12.9 mi |
| 53593 | Verona, WI | 13.2 mi |
| 53713 | Madison, WI | 13.5 mi |
| 53719 | Madison, WI | 13.6 mi |
Questions about 53521
What is the ZIP+4 code for 53521?
53521 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 53521, you need to look up a specific street address to get them.
What city is 53521?
53521 is assigned to Brooklyn, Wisconsin, in Green 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.