ZIP Code 91203 — Glendale, CA
91203 is a standard (street delivery) ZIP code serving Glendale, 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 91203 at a glance
| ZIP code | 91203 |
|---|---|
| Primary city | Glendale |
| State | California (CA) |
| County | Los Angeles FIPS 06037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 16,856 |
| Coordinates | 34.152870, -118.263550 |
How ZIP+4 works in 91203
The four digits after the hyphen encode a delivery segment inside 91203. 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 91203 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 Glendale
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 91203.
| ZIP | City | Distance |
|---|---|---|
| 91210 | Glendale, CA | 0.6 mi |
| 91204 | Glendale, CA | 1.2 mi |
| 91207 | Glendale, CA | 1.5 mi |
| 91205 | Glendale, CA | 1.6 mi |
| 91201 | Glendale, CA | 1.9 mi |
| 91202 | Glendale, CA | 2 mi |
| 90027 | Los Angeles, CA | 2.5 mi |
| 90039 | Los Angeles, CA | 2.8 mi |
| 91206 | Glendale, CA | 2.9 mi |
| 91502 | Burbank, CA | 3.1 mi |
| 91208 | Glendale, CA | 3.1 mi |
| 90041 | Los Angeles, CA | 3.4 mi |
Questions about 91203
What is the ZIP+4 code for 91203?
91203 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 91203, you need to look up a specific street address to get them.
What city is 91203?
91203 is assigned to Glendale, 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?
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