ZIP Code 53931 — Fairwater, WI
53931 is a standard (street delivery) ZIP code serving Fairwater, Wisconsin, in Fond du Lac 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 53931 at a glance
| ZIP code | 53931 |
|---|---|
| Primary city | Fairwater |
| State | Wisconsin (WI) |
| County | Fond du Lac FIPS 55039 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 350 |
| Coordinates | 43.742360, -88.867980 |
How ZIP+4 works in 53931
The four digits after the hyphen encode a delivery segment inside 53931. 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 53931 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 53931.
| ZIP | City | Distance |
|---|---|---|
| 53919 | Brandon, WI | 4.6 mi |
| 53946 | Markesan, WI | 7.9 mi |
| 54971 | Ripon, WI | 8 mi |
| 54941 | Green Lake, WI | 9.7 mi |
| 53963 | Waupun, WI | 9.8 mi |
| 54974 | Rosendale, WI | 10.7 mi |
| 53933 | Fox Lake, WI | 11.8 mi |
| 53947 | Marquette, WI | 13.4 mi |
| 53939 | Kingston, WI | 13.6 mi |
| 54932 | Eldorado, WI | 13.9 mi |
| 54964 | Pickett, WI | 14.2 mi |
| 53935 | Friesland, WI | 14.5 mi |
Questions about 53931
What is the ZIP+4 code for 53931?
53931 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 53931, you need to look up a specific street address to get them.
What city is 53931?
53931 is assigned to Fairwater, Wisconsin, in Fond du Lac 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.