ZIP Code 51443 — Glidden, IA
51443 is a standard (street delivery) ZIP code serving Glidden, 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 51443 at a glance
| ZIP code | 51443 |
|---|---|
| Primary city | Glidden |
| State | Iowa (IA) |
| County | Carroll FIPS 19027 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,653 |
| Coordinates | 42.077480, -94.705170 |
How ZIP+4 works in 51443
The four digits after the hyphen encode a delivery segment inside 51443. 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 51443 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 51443.
| ZIP | City | Distance |
|---|---|---|
| 51459 | Ralston, IA | 4.1 mi |
| 51452 | Lidderdale, IA | 5.1 mi |
| 51451 | Lanesboro, IA | 7.4 mi |
| 51401 | Carroll, IA | 8.5 mi |
| 51462 | Scranton, IA | 8.8 mi |
| 50050 | Churdan, IA | 11.6 mi |
| 51440 | Dedham, IA | 12.7 mi |
| 51449 | Lake City, IA | 13.1 mi |
| 51444 | Halbur, IA | 14.5 mi |
| 51453 | Lohrville, IA | 15.1 mi |
| 50058 | Coon Rapids, IA | 15.2 mi |
| 51463 | Templeton, IA | 15.8 mi |
Questions about 51443
What is the ZIP+4 code for 51443?
51443 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 51443, you need to look up a specific street address to get them.
What city is 51443?
51443 is assigned to Glidden, 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.