ZIP Code 54651 — Ontario, WI
54651 is a standard (street delivery) ZIP code serving Ontario, Wisconsin, in Vernon 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 54651 at a glance
| ZIP code | 54651 |
|---|---|
| Primary city | Ontario |
| State | Wisconsin (WI) |
| County | Vernon FIPS 55123 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,384 |
| Coordinates | 43.723680, -90.570040 |
How ZIP+4 works in 54651
The four digits after the hyphen encode a delivery segment inside 54651. 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 54651 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 54651.
| ZIP | City | Distance |
|---|---|---|
| 54648 | Norwalk, WI | 8.4 mi |
| 54639 | La Farge, WI | 8.5 mi |
| 54670 | Wilton, WI | 9 mi |
| 54638 | Kendall, WI | 10.2 mi |
| 54619 | Cashton, WI | 10.7 mi |
| 54634 | Hillsboro, WI | 11.3 mi |
| 53929 | Elroy, WI | 14.4 mi |
| 54667 | Westby, WI | 15.1 mi |
| 53962 | Union Center, WI | 15.5 mi |
| 54664 | Viola, WI | 15.9 mi |
| 53968 | Wonewoc, WI | 17.8 mi |
| 54660 | Tomah, WI | 18.3 mi |
Questions about 54651
What is the ZIP+4 code for 54651?
54651 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 54651, you need to look up a specific street address to get them.
What city is 54651?
54651 is assigned to Ontario, Wisconsin, in Vernon 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.