ZIP Code 50040 — Boxholm, IA
50040 is a standard (street delivery) ZIP code serving Boxholm, Iowa, in Boone 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 50040 at a glance
| ZIP code | 50040 |
|---|---|
| Primary city | Boxholm |
| State | Iowa (IA) |
| County | Boone FIPS 19015 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 168 |
| Coordinates | 42.173630, -94.101210 |
How ZIP+4 works in 50040
The four digits after the hyphen encode a delivery segment inside 50040. 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 50040 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 50040.
| ZIP | City | Distance |
|---|---|---|
| 50223 | Pilot Mound, IA | 3.7 mi |
| 50544 | Harcourt, IA | 6.6 mi |
| 50530 | Dayton, IA | 7.3 mi |
| 50217 | Paton, IA | 7.6 mi |
| 50064 | Dana, IA | 8 mi |
| 50031 | Beaver, IA | 9.5 mi |
| 50212 | Ogden, IA | 9.8 mi |
| 50107 | Grand Junction, IA | 11.3 mi |
| 50521 | Burnside, IA | 11.9 mi |
| 50249 | Stratford, IA | 12.3 mi |
| 50543 | Gowrie, IA | 12.6 mi |
| 50557 | Lehigh, IA | 12.9 mi |
Questions about 50040
What is the ZIP+4 code for 50040?
50040 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 50040, you need to look up a specific street address to get them.
What city is 50040?
50040 is assigned to Boxholm, Iowa, in Boone 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.