ZIP Code 51045 — Oyens, IA
51045 is a standard (street delivery) ZIP code serving Oyens, Iowa, in Plymouth 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 51045 at a glance
| ZIP code | 51045 |
|---|---|
| Primary city | Oyens |
| State | Iowa (IA) |
| County | Plymouth FIPS 19149 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 66 |
| Coordinates | 42.820190, -96.057720 |
How ZIP+4 works in 51045
The four digits after the hyphen encode a delivery segment inside 51045. 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 51045 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 51045.
| ZIP | City | Distance |
|---|---|---|
| 51050 | Remsen, IA | 5.8 mi |
| 51031 | Le Mars, IA | 6.3 mi |
| 51008 | Brunsville, IA | 10.6 mi |
| 51003 | Alton, IA | 11.8 mi |
| 51036 | Maurice, IA | 12.3 mi |
| 51035 | Marcus, IA | 13.3 mi |
| 51041 | Orange City, IA | 14.1 mi |
| 51022 | Granville, IA | 15.2 mi |
| 51038 | Merrill, IA | 15.3 mi |
| 51028 | Kingsley, IA | 15.6 mi |
| 51027 | Ireton, IA | 17 mi |
| 51024 | Hinton, IA | 17.4 mi |
Questions about 51045
What is the ZIP+4 code for 51045?
51045 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 51045, you need to look up a specific street address to get them.
What city is 51045?
51045 is assigned to Oyens, Iowa, in Plymouth 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.