ZIP Code 54966 — Plainfield, WI
54966 is a standard (street delivery) ZIP code serving Plainfield, Wisconsin, in Waushara 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 54966 at a glance
| ZIP code | 54966 |
|---|---|
| Primary city | Plainfield |
| State | Wisconsin (WI) |
| County | Waushara FIPS 55137 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,202 |
| Coordinates | 44.212760, -89.505790 |
How ZIP+4 works in 54966
The four digits after the hyphen encode a delivery segment inside 54966. 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 54966 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 54966.
| ZIP | City | Distance |
|---|---|---|
| 54921 | Bancroft, WI | 7 mi |
| 54943 | Hancock, WI | 7.2 mi |
| 54909 | Almond, WI | 9.1 mi |
| 54930 | Coloma, WI | 13 mi |
| 54467 | Plover, WI | 14.1 mi |
| 54984 | Wild Rose, WI | 14.3 mi |
| 54982 | Wautoma, WI | 14.4 mi |
| 54494 | Wisconsin Rapids, WI | 14.7 mi |
| 54406 | Amherst, WI | 16.7 mi |
| 54457 | Nekoosa, WI | 19.3 mi |
| 54946 | King, WI | 19.8 mi |
| 54469 | Port Edwards, WI | 20.2 mi |
Questions about 54966
What is the ZIP+4 code for 54966?
54966 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 54966, you need to look up a specific street address to get them.
What city is 54966?
54966 is assigned to Plainfield, Wisconsin, in Waushara 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.