ZIP Code 90640 — Montebello, CA
90640 is a standard (street delivery) ZIP code serving Montebello, 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 90640 at a glance
| ZIP code | 90640 |
|---|---|
| Primary city | Montebello |
| State | California (CA) |
| County | Los Angeles FIPS 06037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 61,382 |
| Coordinates | 34.015060, -118.111000 |
How ZIP+4 works in 90640
The four digits after the hyphen encode a delivery segment inside 90640. 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 90640 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 90640.
| ZIP | City | Distance |
|---|---|---|
| 90660 | Pico Rivera, CA | 2.1 mi |
| 91755 | Monterey Park, CA | 2.3 mi |
| 90040 | Los Angeles, CA | 2.6 mi |
| 90022 | Los Angeles, CA | 2.7 mi |
| 91754 | Monterey Park, CA | 3.1 mi |
| 90606 | Whittier, CA | 3.7 mi |
| 91770 | Rosemead, CA | 3.7 mi |
| 91733 | South El Monte, CA | 3.9 mi |
| 90240 | Downey, CA | 4.1 mi |
| 90601 | Whittier, CA | 4.5 mi |
| 91803 | Alhambra, CA | 4.6 mi |
| 90201 | Bell Gardens, CA | 4.6 mi |
Questions about 90640
What is the ZIP+4 code for 90640?
90640 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 90640, you need to look up a specific street address to get them.
What city is 90640?
90640 is assigned to Montebello, 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.