ZIP Code 91709 — Chino Hills, CA
91709 is a standard (street delivery) ZIP code serving Chino Hills, California, in San Bernardino 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 91709 at a glance
| ZIP code | 91709 |
|---|---|
| Primary city | Chino Hills |
| State | California (CA) |
| County | San Bernardino FIPS 06071 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 78,006 |
| Coordinates | 33.951050, -117.725490 |
How ZIP+4 works in 91709
The four digits after the hyphen encode a delivery segment inside 91709. 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 91709 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 91709.
| ZIP | City | Distance |
|---|---|---|
| 92887 | Yorba Linda, CA | 4.4 mi |
| 91710 | Chino, CA | 4.5 mi |
| 91708 | Chino, CA | 4.6 mi |
| 92823 | Brea, CA | 4.6 mi |
| 91765 | Diamond Bar, CA | 5.7 mi |
| 92886 | Yorba Linda, CA | 5.8 mi |
| 91766 | Pomona, CA | 6.5 mi |
| 92808 | Anaheim, CA | 6.6 mi |
| 92880 | Eastvale, CA | 6.9 mi |
| 91762 | Ontario, CA | 7.1 mi |
| 92807 | Anaheim, CA | 7.9 mi |
| 92821 | Brea, CA | 8.4 mi |
Questions about 91709
What is the ZIP+4 code for 91709?
91709 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 91709, you need to look up a specific street address to get them.
What city is 91709?
91709 is assigned to Chino Hills, California, in San Bernardino 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.