ZIP Code 92057 — Oceanside, CA
92057 is a standard (street delivery) ZIP code serving Oceanside, California, in San Diego 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 92057 at a glance
| ZIP code | 92057 |
|---|---|
| Primary city | Oceanside |
| State | California (CA) |
| County | San Diego FIPS 06073 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 56,835 |
| Coordinates | 33.253260, -117.287040 |
How ZIP+4 works in 92057
The four digits after the hyphen encode a delivery segment inside 92057. 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 92057 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 Oceanside
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 92057.
| ZIP | City | Distance |
|---|---|---|
| 92056 | Oceanside, CA | 3.5 mi |
| 92058 | Oceanside, CA | 3.8 mi |
| 92083 | Vista, CA | 4.4 mi |
| 92084 | Vista, CA | 5.2 mi |
| 92003 | Bonsall, CA | 5.5 mi |
| 92054 | Oceanside, CA | 5.7 mi |
| 92081 | Vista, CA | 6.7 mi |
| 92010 | Carlsbad, CA | 6.7 mi |
| 92008 | Carlsbad, CA | 7.6 mi |
| 92069 | San Marcos, CA | 9.2 mi |
| 92028 | Fallbrook, CA | 9.8 mi |
| 92011 | Carlsbad, CA | 10.1 mi |
Questions about 92057
What is the ZIP+4 code for 92057?
92057 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 92057, you need to look up a specific street address to get them.
What city is 92057?
92057 is assigned to Oceanside, California, in San Diego 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.