ZIP Code 92503 — Riverside, CA
92503 is a standard (street delivery) ZIP code serving Riverside, California, in Riverside 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 92503 at a glance
| ZIP code | 92503 |
|---|---|
| Primary city | Riverside |
| State | California (CA) |
| County | Riverside FIPS 06065 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 88,395 |
| Coordinates | 33.883080, -117.452220 |
How ZIP+4 works in 92503
The four digits after the hyphen encode a delivery segment inside 92503. 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 92503 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 Riverside
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 92503.
| ZIP | City | Distance |
|---|---|---|
| 92504 | Riverside, CA | 3.5 mi |
| 92505 | Riverside, CA | 3.8 mi |
| 92879 | Corona, CA | 4.8 mi |
| 92506 | Riverside, CA | 6.1 mi |
| 92860 | Norco, CA | 6.3 mi |
| 92508 | Riverside, CA | 7.1 mi |
| 92881 | Corona, CA | 7.9 mi |
| 92509 | Jurupa Valley, CA | 8.3 mi |
| 92882 | Corona, CA | 8.6 mi |
| 92883 | Corona, CA | 8.6 mi |
| 92501 | Riverside, CA | 8.9 mi |
| 91752 | Mira Loma, CA | 9.1 mi |
Questions about 92503
What is the ZIP+4 code for 92503?
92503 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 92503, you need to look up a specific street address to get them.
What city is 92503?
92503 is assigned to Riverside, California, in Riverside 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.