ZIP Code 95012 — Castroville, CA
95012 is a standard (street delivery) ZIP code serving Castroville, California, in Monterey 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 95012 at a glance
| ZIP code | 95012 |
|---|---|
| Primary city | Castroville |
| State | California (CA) |
| County | Monterey FIPS 06053 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 10,814 |
| Coordinates | 36.783730, -121.741640 |
How ZIP+4 works in 95012
The four digits after the hyphen encode a delivery segment inside 95012. 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 95012 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 95012.
| ZIP | City | Distance |
|---|---|---|
| 95039 | Moss Landing, CA | 3 mi |
| 93907 | Salinas, CA | 4.2 mi |
| 93906 | Salinas, CA | 7.4 mi |
| 93933 | Marina, CA | 7.8 mi |
| 95004 | Aromas, CA | 8.4 mi |
| 93905 | Salinas, CA | 10.1 mi |
| 95076 | Watsonville, CA | 10.8 mi |
| 95019 | Freedom, CA | 10.8 mi |
| 93901 | Salinas, CA | 11.2 mi |
| 93955 | Seaside, CA | 11.6 mi |
| 93962 | Spreckels, CA | 12.2 mi |
| 95045 | San Juan Bautista, CA | 12.4 mi |
Questions about 95012
What is the ZIP+4 code for 95012?
95012 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 95012, you need to look up a specific street address to get them.
What city is 95012?
95012 is assigned to Castroville, California, in Monterey 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.