ZIP Code 92603 — Irvine, CA
92603 is a standard (street delivery) ZIP code serving Irvine, California, in Orange 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 92603 at a glance
| ZIP code | 92603 |
|---|---|
| Primary city | Irvine |
| State | California (CA) |
| County | Orange FIPS 06059 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 18,387 |
| Coordinates | 33.629270, -117.794080 |
How ZIP+4 works in 92603
The four digits after the hyphen encode a delivery segment inside 92603. 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 92603 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 Irvine
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 92603.
| ZIP | City | Distance |
|---|---|---|
| 92612 | Irvine, CA | 2.7 mi |
| 92617 | Irvine, CA | 2.8 mi |
| 92657 | Newport Coast, CA | 3.1 mi |
| 92697 | Irvine, CA | 3.6 mi |
| 92637 | Laguna Woods, CA | 4.1 mi |
| 92604 | Irvine, CA | 4.1 mi |
| 92614 | Irvine, CA | 4.3 mi |
| 92618 | Irvine, CA | 4.4 mi |
| 92625 | Corona Del Mar, CA | 4.5 mi |
| 92651 | Laguna Beach, CA | 4.6 mi |
| 92660 | Newport Beach, CA | 4.7 mi |
| 92606 | Irvine, CA | 4.9 mi |
Questions about 92603
What is the ZIP+4 code for 92603?
92603 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 92603, you need to look up a specific street address to get them.
What city is 92603?
92603 is assigned to Irvine, California, in Orange 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.