ZIP Code 53021 — Fredonia, WI
53021 is a standard (street delivery) ZIP code serving Fredonia, Wisconsin, in Ozaukee 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 53021 at a glance
| ZIP code | 53021 |
|---|---|
| Primary city | Fredonia |
| State | Wisconsin (WI) |
| County | Ozaukee FIPS 55089 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 4,537 |
| Coordinates | 43.494250, -88.001110 |
How ZIP+4 works in 53021
The four digits after the hyphen encode a delivery segment inside 53021. 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 53021 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 53021.
| ZIP | City | Distance |
|---|---|---|
| 53075 | Random Lake, WI | 4.8 mi |
| 53080 | Saukville, WI | 6 mi |
| 53004 | Belgium, WI | 6 mi |
| 53074 | Port Washington, WI | 7.5 mi |
| 53001 | Adell, WI | 8.1 mi |
| 53013 | Cedar Grove, WI | 9 mi |
| 53090 | West Bend, WI | 9.3 mi |
| 53040 | Kewaskum, WI | 9.7 mi |
| 53095 | West Bend, WI | 10.8 mi |
| 53031 | Hingham, WI | 10.9 mi |
| 53093 | Waldo, WI | 11.4 mi |
| 53024 | Grafton, WI | 11.7 mi |
Questions about 53021
What is the ZIP+4 code for 53021?
53021 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 53021, you need to look up a specific street address to get them.
What city is 53021?
53021 is assigned to Fredonia, Wisconsin, in Ozaukee 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.