ZIP Code 90290 — Topanga, CA
90290 is a standard (street delivery) ZIP code serving Topanga, California, in Los Angeles 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 90290 at a glance
| ZIP code | 90290 |
|---|---|
| Primary city | Topanga |
| State | California (CA) |
| County | Los Angeles FIPS 06037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 6,315 |
| Coordinates | 34.097250, -118.612500 |
How ZIP+4 works in 90290
The four digits after the hyphen encode a delivery segment inside 90290. 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 90290 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 90290.
| ZIP | City | Distance |
|---|---|---|
| 91302 | Calabasas, CA | 3.8 mi |
| 90272 | Pacific Palisades, CA | 4 mi |
| 91364 | Woodland Hills, CA | 4.1 mi |
| 91356 | Tarzana, CA | 5.4 mi |
| 91367 | Woodland Hills, CA | 5.5 mi |
| 91371 | Woodland Hills, CA | 6.4 mi |
| 90263 | Malibu, CA | 6.8 mi |
| 91316 | Encino, CA | 6.9 mi |
| 90049 | Los Angeles, CA | 7 mi |
| 91303 | Canoga Park, CA | 7 mi |
| 90402 | Santa Monica, CA | 7.5 mi |
| 91307 | West Hills, CA | 7.8 mi |
Questions about 90290
What is the ZIP+4 code for 90290?
90290 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 90290, you need to look up a specific street address to get them.
What city is 90290?
90290 is assigned to Topanga, California, in Los Angeles 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.