ZIP Code 91423 — Sherman Oaks, CA
91423 is a standard (street delivery) ZIP code serving Sherman Oaks, California, in Los Angeles 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 91423 at a glance
| ZIP code | 91423 |
|---|---|
| Primary city | Sherman Oaks |
| State | California (CA) |
| County | Los Angeles FIPS 06037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 32,328 |
| Coordinates | 34.149240, -118.432390 |
How ZIP+4 works in 91423
The four digits after the hyphen encode a delivery segment inside 91423. 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 91423 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.
Other ZIP codes in Sherman Oaks
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 91423.
| ZIP | City | Distance |
|---|---|---|
| 91403 | Sherman Oaks, CA | 1.8 mi |
| 91401 | Van Nuys, CA | 2 mi |
| 91607 | Valley Village, CA | 2.2 mi |
| 91604 | Studio City, CA | 2.3 mi |
| 91411 | Van Nuys, CA | 2.5 mi |
| 90077 | Los Angeles, CA | 3.3 mi |
| 91436 | Encino, CA | 3.3 mi |
| 90210 | Beverly Hills, CA | 3.4 mi |
| 91606 | North Hollywood, CA | 3.6 mi |
| 91405 | Van Nuys, CA | 3.7 mi |
| 91601 | North Hollywood, CA | 3.7 mi |
| 91602 | North Hollywood, CA | 3.8 mi |
Questions about 91423
What is the ZIP+4 code for 91423?
91423 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 91423, you need to look up a specific street address to get them.
What city is 91423?
91423 is assigned to Sherman Oaks, California, in Los Angeles 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.