ZIP Code 51459 — Ralston, IA
51459 is a standard (street delivery) ZIP code serving Ralston, Iowa, in Carroll 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 51459 at a glance
| ZIP code | 51459 |
|---|---|
| Primary city | Ralston |
| State | Iowa (IA) |
| County | Carroll FIPS 19027 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 54 |
| Coordinates | 42.044950, -94.637790 |
How ZIP+4 works in 51459
The four digits after the hyphen encode a delivery segment inside 51459. 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 51459 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 51459.
| ZIP | City | Distance |
|---|---|---|
| 51443 | Glidden, IA | 4.1 mi |
| 51462 | Scranton, IA | 4.7 mi |
| 51452 | Lidderdale, IA | 9.2 mi |
| 51451 | Lanesboro, IA | 10.1 mi |
| 50050 | Churdan, IA | 10.5 mi |
| 51401 | Carroll, IA | 12 mi |
| 51440 | Dedham, IA | 12.9 mi |
| 50058 | Coon Rapids, IA | 13.2 mi |
| 50129 | Jefferson, IA | 13.6 mi |
| 51453 | Lohrville, IA | 15.7 mi |
| 50029 | Bayard, IA | 15.8 mi |
| 50026 | Bagley, IA | 16.1 mi |
Questions about 51459
What is the ZIP+4 code for 51459?
51459 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 51459, you need to look up a specific street address to get them.
What city is 51459?
51459 is assigned to Ralston, Iowa, in Carroll 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.