ZIP Code 50565 — Marathon, IA
50565 is a standard (street delivery) ZIP code serving Marathon, Iowa, in Buena Vista 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 50565 at a glance
| ZIP code | 50565 |
|---|---|
| Primary city | Marathon |
| State | Iowa (IA) |
| County | Buena Vista FIPS 19021 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 380 |
| Coordinates | 42.861180, -94.996980 |
How ZIP+4 works in 50565
The four digits after the hyphen encode a delivery segment inside 50565. 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 50565 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 50565.
| ZIP | City | Distance |
|---|---|---|
| 51366 | Webb, IA | 6.9 mi |
| 50510 | Albert City, IA | 7 mi |
| 50554 | Laurens, IA | 7.9 mi |
| 50585 | Sioux Rapids, IA | 8.1 mi |
| 50576 | Rembrandt, IA | 10 mi |
| 51341 | Gillett Grove, IA | 11 mi |
| 51343 | Greenville, IA | 12.3 mi |
| 50515 | Ayrshire, IA | 12.5 mi |
| 50527 | Curlew, IA | 12.7 mi |
| 50592 | Truesdale, IA | 13.1 mi |
| 51033 | Linn Grove, IA | 13.5 mi |
| 50546 | Havelock, IA | 14.9 mi |
Questions about 50565
What is the ZIP+4 code for 50565?
50565 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 50565, you need to look up a specific street address to get them.
What city is 50565?
50565 is assigned to Marathon, Iowa, in Buena Vista 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.