ZIP Code 50839 — Carbon, IA
50839 is a standard (street delivery) ZIP code serving Carbon, Iowa, in Adams 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 50839 at a glance
| ZIP code | 50839 |
|---|---|
| Primary city | Carbon |
| State | Iowa (IA) |
| County | Adams FIPS 19003 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 46 |
| Coordinates | 41.048740, -94.822060 |
How ZIP+4 works in 50839
The four digits after the hyphen encode a delivery segment inside 50839. 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 50839 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 50839.
| ZIP | City | Distance |
|---|---|---|
| 50841 | Corning, IA | 4 mi |
| 50857 | Nodaway, IA | 8.1 mi |
| 50864 | Villisca, IA | 9.6 mi |
| 50847 | Grant, IA | 10.6 mi |
| 50859 | Prescott, IA | 11.6 mi |
| 50853 | Massena, IA | 13.3 mi |
| 50843 | Cumberland, IA | 13.7 mi |
| 50837 | Bridgewater, IA | 14.4 mi |
| 51573 | Stanton, IA | 15 mi |
| 51532 | Elliott, IA | 16.2 mi |
| 50851 | Lenox, IA | 17.9 mi |
| 50848 | Gravity, IA | 18.3 mi |
Questions about 50839
What is the ZIP+4 code for 50839?
50839 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 50839, you need to look up a specific street address to get them.
What city is 50839?
50839 is assigned to Carbon, Iowa, in Adams 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.