ZIP Code 52644 — Mount Union, IA
52644 is a standard (street delivery) ZIP code serving Mount Union, Iowa, in Henry 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 52644 at a glance
| ZIP code | 52644 |
|---|---|
| Primary city | Mount Union |
| State | Iowa (IA) |
| County | Henry FIPS 19087 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 394 |
| Coordinates | 41.039880, -91.415350 |
How ZIP+4 works in 52644
The four digits after the hyphen encode a delivery segment inside 52644. 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 52644 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 52644.
| ZIP | City | Distance |
|---|---|---|
| 52659 | Winfield, IA | 6.5 mi |
| 52660 | Yarmouth, IA | 6.9 mi |
| 52640 | Morning Sun, IA | 8 mi |
| 52652 | Swedesburg, IA | 8.3 mi |
| 52645 | New London, IA | 8.7 mi |
| 52647 | Olds, IA | 9.4 mi |
| 52641 | Mount Pleasant, IA | 9.5 mi |
| 52621 | Crawfordsville, IA | 13.1 mi |
| 52623 | Danville, IA | 13.3 mi |
| 52637 | Mediapolis, IA | 14.5 mi |
| 52654 | Wayland, IA | 14.8 mi |
| 52650 | Sperry, IA | 14.9 mi |
Questions about 52644
What is the ZIP+4 code for 52644?
52644 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 52644, you need to look up a specific street address to get them.
What city is 52644?
52644 is assigned to Mount Union, Iowa, in Henry 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.