ZIP Code 52594 — Unionville, IA
52594 is a standard (street delivery) ZIP code serving Unionville, Iowa, in Appanoose 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 52594 at a glance
| ZIP code | 52594 |
|---|---|
| Primary city | Unionville |
| State | Iowa (IA) |
| County | Appanoose FIPS 19007 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 676 |
| Coordinates | 40.835610, -92.649570 |
How ZIP+4 works in 52594
The four digits after the hyphen encode a delivery segment inside 52594. 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 52594 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 52594.
| ZIP | City | Distance |
|---|---|---|
| 52552 | Drakesville, IA | 5.9 mi |
| 52593 | Udell, IA | 6.4 mi |
| 52536 | Blakesburg, IA | 8.3 mi |
| 52571 | Moravia, IA | 9.9 mi |
| 52572 | Moulton, IA | 11.1 mi |
| 52537 | Bloomfield, IA | 14.1 mi |
| 52544 | Centerville, IA | 15.8 mi |
| 52531 | Albia, IA | 15.8 mi |
| 52555 | Exline, IA | 16 mi |
| 52574 | Mystic, IA | 16.8 mi |
| 52501 | Ottumwa, IA | 18 mi |
| 63535 | Coatsville, MO | 18.2 mi |
Questions about 52594
What is the ZIP+4 code for 52594?
52594 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 52594, you need to look up a specific street address to get them.
What city is 52594?
52594 is assigned to Unionville, Iowa, in Appanoose 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.