ZIP Code 54002 — Baldwin, WI
54002 is a standard (street delivery) ZIP code serving Baldwin, Wisconsin, in St. Croix 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 54002 at a glance
| ZIP code | 54002 |
|---|---|
| Primary city | Baldwin |
| State | Wisconsin (WI) |
| County | St. Croix FIPS 55109 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 6,872 |
| Coordinates | 44.958710, -92.371210 |
How ZIP+4 works in 54002
The four digits after the hyphen encode a delivery segment inside 54002. 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 54002 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 54002.
| ZIP | City | Distance |
|---|---|---|
| 54015 | Hammond, WI | 4.1 mi |
| 54028 | Woodville, WI | 4.3 mi |
| 54027 | Wilson, WI | 8.7 mi |
| 54023 | Roberts, WI | 8.9 mi |
| 54767 | Spring Valley, WI | 10.7 mi |
| 54013 | Glenwood City, WI | 10.9 mi |
| 54003 | Beldenville, WI | 12.1 mi |
| 54017 | New Richmond, WI | 13.3 mi |
| 54749 | Knapp, WI | 13.4 mi |
| 54022 | River Falls, WI | 13.9 mi |
| 54734 | Downing, WI | 15.5 mi |
| 54016 | Hudson, WI | 15.8 mi |
Questions about 54002
What is the ZIP+4 code for 54002?
54002 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 54002, you need to look up a specific street address to get them.
What city is 54002?
54002 is assigned to Baldwin, Wisconsin, in St. Croix 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.