ZIP Code 54401 — Wausau, WI
54401 is a standard (street delivery) ZIP code serving Wausau, Wisconsin, in Marathon 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 54401 at a glance
| ZIP code | 54401 |
|---|---|
| Primary city | Wausau |
| State | Wisconsin (WI) |
| County | Marathon FIPS 55073 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 31,692 |
| Coordinates | 44.966470, -89.707940 |
How ZIP+4 works in 54401
The four digits after the hyphen encode a delivery segment inside 54401. 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 54401 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.
Other ZIP codes in Wausau
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 54401.
| ZIP | City | Distance |
|---|---|---|
| 54417 | Brokaw, WI | 5 mi |
| 54448 | Marathon, WI | 6.6 mi |
| 54474 | Rothschild, WI | 7.6 mi |
| 54476 | Schofield, WI | 10.5 mi |
| 54403 | Wausau, WI | 10.5 mi |
| 54455 | Mosinee, WI | 14.1 mi |
| 54471 | Ringle, WI | 14.3 mi |
| 54426 | Edgar, WI | 14.3 mi |
| 54411 | Athens, WI | 16.7 mi |
| 54452 | Merrill, WI | 17 mi |
| 54440 | Hatley, WI | 19.1 mi |
| 54408 | Aniwa, WI | 19.9 mi |
Questions about 54401
What is the ZIP+4 code for 54401?
54401 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 54401, you need to look up a specific street address to get them.
What city is 54401?
54401 is assigned to Wausau, Wisconsin, in Marathon 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.