ZIP Code 51365 — Wallingford, IA
51365 is a standard (street delivery) ZIP code serving Wallingford, Iowa, in Emmet 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 51365 at a glance
| ZIP code | 51365 |
|---|---|
| Primary city | Wallingford |
| State | Iowa (IA) |
| County | Emmet FIPS 19063 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 416 |
| Coordinates | 43.306520, -94.734900 |
How ZIP+4 works in 51365
The four digits after the hyphen encode a delivery segment inside 51365. 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 51365 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 51365.
| ZIP | City | Distance |
|---|---|---|
| 51342 | Graettinger, IA | 4.3 mi |
| 51334 | Estherville, IA | 7.6 mi |
| 50578 | Ringsted, IA | 9.4 mi |
| 51364 | Terril, IA | 11.5 mi |
| 50531 | Dolliver, IA | 12.1 mi |
| 50536 | Emmetsburg, IA | 13.3 mi |
| 51363 | Superior, IA | 13.8 mi |
| 51358 | Ruthven, IA | 14.6 mi |
| 50514 | Armstrong, IA | 15.1 mi |
| 50528 | Cylinder, IA | 15.2 mi |
| 50539 | Fenton, IA | 16.6 mi |
| 56127 | Dunnell, MN | 16.8 mi |
Questions about 51365
What is the ZIP+4 code for 51365?
51365 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 51365, you need to look up a specific street address to get them.
What city is 51365?
51365 is assigned to Wallingford, Iowa, in Emmet 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.