ZIP Code 50528 — Cylinder, IA
50528 is a standard (street delivery) ZIP code serving Cylinder, Iowa, in Palo Alto 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 50528 at a glance
| ZIP code | 50528 |
|---|---|
| Primary city | Cylinder |
| State | Iowa (IA) |
| County | Palo Alto FIPS 19147 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 366 |
| Coordinates | 43.137170, -94.540230 |
How ZIP+4 works in 50528
The four digits after the hyphen encode a delivery segment inside 50528. 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 50528 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 50528.
| ZIP | City | Distance |
|---|---|---|
| 50598 | Whittemore, IA | 7.3 mi |
| 50536 | Emmetsburg, IA | 8 mi |
| 50539 | Fenton, IA | 9.1 mi |
| 50578 | Ringsted, IA | 11.3 mi |
| 50559 | Lone Rock, IA | 11.9 mi |
| 50597 | West Bend, IA | 12.1 mi |
| 51342 | Graettinger, IA | 12.4 mi |
| 50562 | Mallard, IA | 13.1 mi |
| 51365 | Wallingford, IA | 15.3 mi |
| 50511 | Algona, IA | 16.7 mi |
| 50527 | Curlew, IA | 17.2 mi |
| 51358 | Ruthven, IA | 17.9 mi |
Questions about 50528
What is the ZIP+4 code for 50528?
50528 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 50528, you need to look up a specific street address to get them.
What city is 50528?
50528 is assigned to Cylinder, Iowa, in Palo Alto 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.