ZIP Code 93422 — Atascadero, CA
93422 is a standard (street delivery) ZIP code serving Atascadero, California, in San Luis Obispo 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 93422 at a glance
| ZIP code | 93422 |
|---|---|
| Primary city | Atascadero |
| State | California (CA) |
| County | San Luis Obispo FIPS 06079 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 33,002 |
| Coordinates | 35.463800, -120.690070 |
How ZIP+4 works in 93422
The four digits after the hyphen encode a delivery segment inside 93422. 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 93422 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 93422.
| ZIP | City | Distance |
|---|---|---|
| 93465 | Templeton, CA | 6 mi |
| 93442 | Morro Bay, CA | 7.8 mi |
| 93409 | San Luis Obispo, CA | 9.7 mi |
| 93408 | San Luis Obispo, CA | 10 mi |
| 93407 | San Luis Obispo, CA | 10.8 mi |
| 93410 | San Luis Obispo, CA | 11.2 mi |
| 93405 | San Luis Obispo, CA | 11.7 mi |
| 93432 | Creston, CA | 12.3 mi |
| 93430 | Cayucos, CA | 13.3 mi |
| 93446 | Paso Robles, CA | 13.5 mi |
| 93402 | Los Osos, CA | 14.6 mi |
| 93401 | San Luis Obispo, CA | 16.3 mi |
Questions about 93422
What is the ZIP+4 code for 93422?
93422 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 93422, you need to look up a specific street address to get them.
What city is 93422?
93422 is assigned to Atascadero, California, in San Luis Obispo 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.