ZIP Code 53125 — Fontana, WI
53125 is a standard (street delivery) ZIP code serving Fontana, Wisconsin, in Walworth 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 53125 at a glance
| ZIP code | 53125 |
|---|---|
| Primary city | Fontana |
| State | Wisconsin (WI) |
| County | Walworth FIPS 55127 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,898 |
| Coordinates | 42.545320, -88.562160 |
How ZIP+4 works in 53125
The four digits after the hyphen encode a delivery segment inside 53125. 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 53125 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 53125.
| ZIP | City | Distance |
|---|---|---|
| 53191 | Williams Bay, WI | 2.4 mi |
| 53184 | Walworth, WI | 2.6 mi |
| 53195 | Zenda, WI | 4.3 mi |
| 53147 | Lake Geneva, WI | 6 mi |
| 53585 | Sharon, WI | 8.1 mi |
| 60033 | Harvard, IL | 8.8 mi |
| 60034 | Hebron, IL | 9.1 mi |
| 53115 | Delavan, WI | 9.4 mi |
| 53157 | Pell Lake, WI | 9.9 mi |
| 53176 | Springfield, WI | 10.1 mi |
| 53114 | Darien, WI | 10.5 mi |
| 53128 | Genoa City, WI | 11.4 mi |
Questions about 53125
What is the ZIP+4 code for 53125?
53125 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 53125, you need to look up a specific street address to get them.
What city is 53125?
53125 is assigned to Fontana, Wisconsin, in Walworth 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.