ZIP Code 51551 — Malvern, IA
51551 is a standard (street delivery) ZIP code serving Malvern, Iowa, in Mills 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 51551 at a glance
| ZIP code | 51551 |
|---|---|
| Primary city | Malvern |
| State | Iowa (IA) |
| County | Mills FIPS 19129 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,842 |
| Coordinates | 40.991290, -95.589070 |
How ZIP+4 works in 51551
The four digits after the hyphen encode a delivery segment inside 51551. 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 51551 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 51551.
| ZIP | City | Distance |
|---|---|---|
| 51540 | Hastings, IA | 5.3 mi |
| 51534 | Glenwood, IA | 7.6 mi |
| 51653 | Tabor, IA | 8.5 mi |
| 51649 | Randolph, IA | 10 mi |
| 51571 | Silver City, IA | 10.7 mi |
| 51533 | Emerson, IA | 11.4 mi |
| 51645 | Imogene, IA | 11.5 mi |
| 51561 | Pacific Junction, IA | 11.5 mi |
| 51554 | Mineola, IA | 11.6 mi |
| 51541 | Henderson, IA | 13.5 mi |
| 51654 | Thurman, IA | 14.2 mi |
| 51549 | Macedonia, IA | 14.9 mi |
Questions about 51551
What is the ZIP+4 code for 51551?
51551 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 51551, you need to look up a specific street address to get them.
What city is 51551?
51551 is assigned to Malvern, Iowa, in Mills 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.