ZIP Code 54547 — Mercer, WI
54547 is a standard (street delivery) ZIP code serving Mercer, Wisconsin, in Iron 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 54547 at a glance
| ZIP code | 54547 |
|---|---|
| Primary city | Mercer |
| State | Wisconsin (WI) |
| County | Iron FIPS 55051 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,549 |
| Coordinates | 46.189510, -90.099400 |
How ZIP+4 works in 54547
The four digits after the hyphen encode a delivery segment inside 54547. 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 54547 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 54547.
| ZIP | City | Distance |
|---|---|---|
| 54545 | Manitowish Waters, WI | 12.4 mi |
| 54534 | Hurley, WI | 13.2 mi |
| 54550 | Montreal, WI | 14 mi |
| 54536 | Iron Belt, WI | 15.5 mi |
| 54557 | Presque Isle, WI | 16.6 mi |
| 54538 | Lac Du Flambeau, WI | 17.4 mi |
| 54525 | Gile, WI | 17.9 mi |
| 54565 | Upson, WI | 18.6 mi |
| 54552 | Park Falls, WI | 19.7 mi |
| 49959 | Ramsay, MI | 19.9 mi |
| 49911 | Bessemer, MI | 21 mi |
| 54512 | Boulder Junction, WI | 21.6 mi |
Questions about 54547
What is the ZIP+4 code for 54547?
54547 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 54547, you need to look up a specific street address to get them.
What city is 54547?
54547 is assigned to Mercer, Wisconsin, in Iron 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.