ZIP Code 51525 — Carson, IA
51525 is a standard (street delivery) ZIP code serving Carson, Iowa, in Pottawattamie 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 51525 at a glance
| ZIP code | 51525 |
|---|---|
| Primary city | Carson |
| State | Iowa (IA) |
| County | Pottawattamie FIPS 19155 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,067 |
| Coordinates | 41.234430, -95.419990 |
How ZIP+4 works in 51525
The four digits after the hyphen encode a delivery segment inside 51525. 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 51525 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 51525.
| ZIP | City | Distance |
|---|---|---|
| 51549 | Macedonia, IA | 4 mi |
| 51560 | Oakland, IA | 5.8 mi |
| 51541 | Henderson, IA | 6.8 mi |
| 51575 | Treynor, IA | 9.5 mi |
| 51536 | Hancock, IA | 10.8 mi |
| 51571 | Silver City, IA | 11.6 mi |
| 51548 | Mcclelland, IA | 12.6 mi |
| 51533 | Emerson, IA | 13.8 mi |
| 51553 | Minden, IA | 14.1 mi |
| 51535 | Griswold, IA | 14.9 mi |
| 51554 | Mineola, IA | 14.9 mi |
| 51540 | Hastings, IA | 15 mi |
Questions about 51525
What is the ZIP+4 code for 51525?
51525 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 51525, you need to look up a specific street address to get them.
What city is 51525?
51525 is assigned to Carson, Iowa, in Pottawattamie 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.