ZIP Code 97138 — Seaside, OR
97138 is a standard (street delivery) ZIP code serving Seaside, Oregon, in Clatsop 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 97138 at a glance
| ZIP code | 97138 |
|---|---|
| Primary city | Seaside |
| State | Oregon (OR) |
| County | Clatsop FIPS 41007 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 11,035 |
| Coordinates | 45.909460, -123.700360 |
How ZIP+4 works in 97138
The four digits after the hyphen encode a delivery segment inside 97138. 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 97138 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 97138.
| ZIP | City | Distance |
|---|---|---|
| 97110 | Cannon Beach, OR | 12.1 mi |
| 97145 | Tolovana Park, OR | 12.9 mi |
| 97102 | Arch Cape, OR | 14.3 mi |
| 97131 | Nehalem, OR | 14.4 mi |
| 97103 | Astoria, OR | 15.4 mi |
| 97130 | Manzanita, OR | 17.4 mi |
| 97146 | Warrenton, OR | 17.7 mi |
| 97147 | Wheeler, OR | 17.8 mi |
| 97136 | Rockaway Beach, OR | 21.6 mi |
| 97144 | Timber, OR | 22.2 mi |
| 97064 | Vernonia, OR | 22.7 mi |
| 97016 | Clatskanie, OR | 23 mi |
Questions about 97138
What is the ZIP+4 code for 97138?
97138 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 97138, you need to look up a specific street address to get them.
What city is 97138?
97138 is assigned to Seaside, Oregon, in Clatsop 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.