ZIP Code 91107 — Pasadena, CA
91107 is a standard (street delivery) ZIP code serving Pasadena, 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 91107 at a glance
| ZIP code | 91107 |
|---|---|
| Primary city | Pasadena |
| State | California (CA) |
| County | Los Angeles FIPS 06037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 32,316 |
| Coordinates | 34.159190, -118.086880 |
How ZIP+4 works in 91107
The four digits after the hyphen encode a delivery segment inside 91107. 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 91107 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 Pasadena
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 91107.
| ZIP | City | Distance |
|---|---|---|
| 91104 | Pasadena, CA | 2.2 mi |
| 91024 | Sierra Madre, CA | 2.5 mi |
| 91125 | Pasadena, CA | 2.6 mi |
| 91106 | Pasadena, CA | 2.8 mi |
| 91108 | San Marino, CA | 3 mi |
| 91775 | San Gabriel, CA | 3.1 mi |
| 91007 | Arcadia, CA | 3.1 mi |
| 91101 | Pasadena, CA | 3.1 mi |
| 91006 | Arcadia, CA | 3.8 mi |
| 91001 | Altadena, CA | 3.9 mi |
| 91780 | Temple City, CA | 4.4 mi |
| 91103 | Pasadena, CA | 4.5 mi |
Questions about 91107
What is the ZIP+4 code for 91107?
91107 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 91107, you need to look up a specific street address to get them.
What city is 91107?
91107 is assigned to Pasadena, 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.