ZIP Code 54864 — Poplar, WI
54864 is a standard (street delivery) ZIP code serving Poplar, Wisconsin, in Douglas 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 54864 at a glance
| ZIP code | 54864 |
|---|---|
| Primary city | Poplar |
| State | Wisconsin (WI) |
| County | Douglas FIPS 55031 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,590 |
| Coordinates | 46.604310, -91.794430 |
How ZIP+4 works in 54864
The four digits after the hyphen encode a delivery segment inside 54864. 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 54864 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 54864.
| ZIP | City | Distance |
|---|---|---|
| 54854 | Maple, WI | 6.5 mi |
| 54874 | South Range, WI | 7.5 mi |
| 54842 | Hawthorne, WI | 8 mi |
| 54849 | Lake Nebagamon, WI | 9.4 mi |
| 54820 | Brule, WI | 11.8 mi |
| 54880 | Superior, WI | 15.8 mi |
| 55802 | Duluth, MN | 17 mi |
| 54873 | Solon Springs, WI | 18.5 mi |
| 54847 | Iron River, WI | 18.8 mi |
| 55806 | Duluth, MN | 19.5 mi |
| 55812 | Duluth, MN | 19.6 mi |
| 55805 | Duluth, MN | 19.7 mi |
Questions about 54864
What is the ZIP+4 code for 54864?
54864 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 54864, you need to look up a specific street address to get them.
What city is 54864?
54864 is assigned to Poplar, Wisconsin, in Douglas 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.