ZIP Code 50258 — Union, IA
50258 is a standard (street delivery) ZIP code serving Union, Iowa, in Hardin 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 50258 at a glance
| ZIP code | 50258 |
|---|---|
| Primary city | Union |
| State | Iowa (IA) |
| County | Hardin FIPS 19083 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 958 |
| Coordinates | 42.227810, -93.077880 |
How ZIP+4 works in 50258
The four digits after the hyphen encode a delivery segment inside 50258. 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 50258 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 50258.
| ZIP | City | Distance |
|---|---|---|
| 50269 | Whitten, IA | 4.2 mi |
| 50148 | Liscomb, IA | 5.3 mi |
| 50206 | New Providence, IA | 5.9 mi |
| 50051 | Clemons, IA | 6.9 mi |
| 50005 | Albion, IA | 7.3 mi |
| 50621 | Conrad, IA | 8.2 mi |
| 50627 | Eldora, IA | 8.5 mi |
| 50239 | Saint Anthony, IA | 8.5 mi |
| 50278 | Zearing, IA | 12.4 mi |
| 50122 | Hubbard, IA | 12.9 mi |
| 50672 | Steamboat Rock, IA | 13.6 mi |
| 50609 | Beaman, IA | 13.7 mi |
Questions about 50258
What is the ZIP+4 code for 50258?
50258 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 50258, you need to look up a specific street address to get them.
What city is 50258?
50258 is assigned to Union, Iowa, in Hardin 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.