ZIP Code 96137 — Westwood, CA
96137 is a standard (street delivery) ZIP code serving Westwood, California, in Lassen 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 96137 at a glance
| ZIP code | 96137 |
|---|---|
| Primary city | Westwood |
| State | California (CA) |
| County | Lassen FIPS 06035 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 2,923 |
| Coordinates | 40.385540, -121.124780 |
How ZIP+4 works in 96137
The four digits after the hyphen encode a delivery segment inside 96137. 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 96137 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 96137.
| ZIP | City | Distance |
|---|---|---|
| 96020 | Chester, CA | 9.3 mi |
| 95923 | Canyon Dam, CA | 13.9 mi |
| 96061 | Mill Creek, CA | 19.3 mi |
| 95947 | Greenville, CA | 21.5 mi |
| 95934 | Crescent Mills, CA | 23.7 mi |
| 96063 | Mineral, CA | 25.2 mi |
| 96071 | Old Station, CA | 26.7 mi |
| 95984 | Twain, CA | 26.8 mi |
| 96130 | Susanville, CA | 28.3 mi |
| 95915 | Belden, CA | 28.4 mi |
| 95983 | Taylorsville, CA | 30.3 mi |
| 95971 | Quincy, CA | 33.4 mi |
Questions about 96137
What is the ZIP+4 code for 96137?
96137 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 96137, you need to look up a specific street address to get them.
What city is 96137?
96137 is assigned to Westwood, California, in Lassen 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.