ZIP Code 91320 — Newbury Park, CA
91320 is a standard (street delivery) ZIP code serving Newbury Park, California, in Ventura 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 91320 at a glance
| ZIP code | 91320 |
|---|---|
| Primary city | Newbury Park |
| State | California (CA) |
| County | Ventura FIPS 06111 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 43,472 |
| Coordinates | 34.173390, -118.947950 |
How ZIP+4 works in 91320
The four digits after the hyphen encode a delivery segment inside 91320. 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 91320 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 91320.
| ZIP | City | Distance |
|---|---|---|
| 93012 | Camarillo, CA | 3.4 mi |
| 91361 | Westlake Village, CA | 4.3 mi |
| 91360 | Thousand Oaks, CA | 4.9 mi |
| 91362 | Thousand Oaks, CA | 7.5 mi |
| 93010 | Camarillo, CA | 8.2 mi |
| 90265 | Malibu, CA | 8.9 mi |
| 93066 | Somis, CA | 9.2 mi |
| 93021 | Moorpark, CA | 9.8 mi |
| 93033 | Oxnard, CA | 10.1 mi |
| 91377 | Oak Park, CA | 10.4 mi |
| 91301 | Agoura Hills, CA | 11.4 mi |
| 93065 | Simi Valley, CA | 11.8 mi |
Questions about 91320
What is the ZIP+4 code for 91320?
91320 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 91320, you need to look up a specific street address to get them.
What city is 91320?
91320 is assigned to Newbury Park, California, in Ventura 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?
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