ZIP Code 50842 — Cromwell, IA
50842 is a standard (street delivery) ZIP code serving Cromwell, Iowa, in Union 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 50842 at a glance
| ZIP code | 50842 |
|---|---|
| Primary city | Cromwell |
| State | Iowa (IA) |
| County | Union FIPS 19175 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 99 |
| Coordinates | 41.039910, -94.461800 |
How ZIP+4 works in 50842
The four digits after the hyphen encode a delivery segment inside 50842. 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 50842 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 50842.
| ZIP | City | Distance |
|---|---|---|
| 50801 | Creston, IA | 4.5 mi |
| 50859 | Prescott, IA | 7.4 mi |
| 50851 | Lenox, IA | 10.2 mi |
| 50858 | Orient, IA | 12 mi |
| 50861 | Shannon City, IA | 13.9 mi |
| 50831 | Arispe, IA | 13.9 mi |
| 50830 | Afton, IA | 14.2 mi |
| 50841 | Corning, IA | 15.8 mi |
| 50845 | Diagonal, IA | 16.4 mi |
| 50840 | Clearfield, IA | 17 mi |
| 50837 | Bridgewater, IA | 17.4 mi |
| 50155 | Macksburg, IA | 18.2 mi |
Questions about 50842
What is the ZIP+4 code for 50842?
50842 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 50842, you need to look up a specific street address to get them.
What city is 50842?
50842 is assigned to Cromwell, Iowa, in Union 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.