ZIP Code 54856 — Mason, WI
54856 is a standard (street delivery) ZIP code serving Mason, Wisconsin, in Bayfield 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 54856 at a glance
| ZIP code | 54856 |
|---|---|
| Primary city | Mason |
| State | Wisconsin (WI) |
| County | Bayfield FIPS 55007 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,628 |
| Coordinates | 46.434010, -91.102790 |
How ZIP+4 works in 54856
The four digits after the hyphen encode a delivery segment inside 54856. 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 54856 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 54856.
| ZIP | City | Distance |
|---|---|---|
| 54839 | Grand View, WI | 5.7 mi |
| 54855 | Marengo, WI | 13 mi |
| 54832 | Drummond, WI | 13.1 mi |
| 54806 | Ashland, WI | 14.3 mi |
| 54821 | Cable, WI | 14.8 mi |
| 54847 | Iron River, WI | 17 mi |
| 54846 | High Bridge, WI | 18.4 mi |
| 54891 | Washburn, WI | 19.3 mi |
| 54546 | Mellen, WI | 21.3 mi |
| 54517 | Clam Lake, WI | 23.2 mi |
| 54820 | Brule, WI | 23.2 mi |
| 54861 | Odanah, WI | 24.6 mi |
Questions about 54856
What is the ZIP+4 code for 54856?
54856 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 54856, you need to look up a specific street address to get them.
What city is 54856?
54856 is assigned to Mason, Wisconsin, in Bayfield 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.