ZIP Code 94038 — Moss Beach, CA
94038 is a standard (street delivery) ZIP code serving Moss Beach, California, in San Mateo 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 94038 at a glance
| ZIP code | 94038 |
|---|---|
| Primary city | Moss Beach |
| State | California (CA) |
| County | San Mateo FIPS 06081 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 2,683 |
| Coordinates | 37.529460, -122.484900 |
How ZIP+4 works in 94038
The four digits after the hyphen encode a delivery segment inside 94038. 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 94038 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 94038.
| ZIP | City | Distance |
|---|---|---|
| 94037 | Montara, CA | 1.7 mi |
| 94018 | El Granada, CA | 1.7 mi |
| 94044 | Pacifica, CA | 5.2 mi |
| 94030 | Millbrae, CA | 6.6 mi |
| 94010 | Burlingame, CA | 6.6 mi |
| 94066 | San Bruno, CA | 7.2 mi |
| 94019 | Half Moon Bay, CA | 7.2 mi |
| 94402 | San Mateo, CA | 8.3 mi |
| 94128 | San Francisco, CA | 8.4 mi |
| 94080 | South San Francisco, CA | 9.4 mi |
| 94401 | San Mateo, CA | 9.6 mi |
| 94403 | San Mateo, CA | 9.9 mi |
Questions about 94038
What is the ZIP+4 code for 94038?
94038 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 94038, you need to look up a specific street address to get them.
What city is 94038?
94038 is assigned to Moss Beach, California, in San Mateo 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.