ZIP Code 50137 — Killduff, IA
50137 is a standard (street delivery) ZIP code serving Killduff, Iowa, in Jasper 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 50137 at a glance
| ZIP code | 50137 |
|---|---|
| Primary city | Killduff |
| State | Iowa (IA) |
| County | Jasper FIPS 19099 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 114 |
| Coordinates | 41.608720, -92.921260 |
How ZIP+4 works in 50137
The four digits after the hyphen encode a delivery segment inside 50137. 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 50137 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 50137.
| ZIP | City | Distance |
|---|---|---|
| 50251 | Sully, IA | 3.8 mi |
| 50232 | Reasnor, IA | 4.3 mi |
| 50153 | Lynnville, IA | 6.6 mi |
| 50208 | Newton, IA | 9.3 mi |
| 50135 | Kellogg, IA | 9.7 mi |
| 50170 | Monroe, IA | 11.4 mi |
| 50242 | Searsboro, IA | 12.1 mi |
| 50214 | Otley, IA | 12.2 mi |
| 50219 | Pella, IA | 12.9 mi |
| 50112 | Grinnell, IA | 13.6 mi |
| 50228 | Prairie City, IA | 16.7 mi |
| 50054 | Colfax, IA | 16.9 mi |
Questions about 50137
What is the ZIP+4 code for 50137?
50137 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 50137, you need to look up a specific street address to get them.
What city is 50137?
50137 is assigned to Killduff, Iowa, in Jasper 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.