ZIP Code 97638 — Silver Lake, OR
97638 is a standard (street delivery) ZIP code serving Silver Lake, Oregon, in Lake 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 97638 at a glance
| ZIP code | 97638 |
|---|---|
| Primary city | Silver Lake |
| State | Oregon (OR) |
| County | Lake FIPS 41037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 373 |
| Coordinates | 43.145800, -121.011560 |
How ZIP+4 works in 97638
The four digits after the hyphen encode a delivery segment inside 97638. 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 97638 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 97638.
| ZIP | City | Distance |
|---|---|---|
| 97735 | Fort Rock, OR | 16.9 mi |
| 97640 | Summer Lake, OR | 24.4 mi |
| 97641 | Christmas Valley, OR | 25.8 mi |
| 97636 | Paisley, OR | 38.7 mi |
Questions about 97638
What is the ZIP+4 code for 97638?
97638 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 97638, you need to look up a specific street address to get them.
What city is 97638?
97638 is assigned to Silver Lake, Oregon, in Lake 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.