ZIP Code 95540 — Fortuna, CA
95540 is a standard (street delivery) ZIP code serving Fortuna, California, in Humboldt 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 95540 at a glance
| ZIP code | 95540 |
|---|---|
| Primary city | Fortuna |
| State | California (CA) |
| County | Humboldt FIPS 06023 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 14,469 |
| Coordinates | 40.566710, -124.126510 |
How ZIP+4 works in 95540
The four digits after the hyphen encode a delivery segment inside 95540. 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 95540 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 95540.
| ZIP | City | Distance |
|---|---|---|
| 95547 | Hydesville, CA | 2.6 mi |
| 95562 | Rio Dell, CA | 7.6 mi |
| 95536 | Ferndale, CA | 8.2 mi |
| 95551 | Loleta, CA | 8.6 mi |
| 95565 | Scotia, CA | 9.7 mi |
| 95503 | Eureka, CA | 11 mi |
| 95528 | Carlotta, CA | 11.8 mi |
| 95537 | Fields Landing, CA | 13.1 mi |
| 95549 | Kneeland, CA | 13.7 mi |
| 95564 | Samoa, CA | 15.9 mi |
| 95501 | Eureka, CA | 16.4 mi |
| 95571 | Weott, CA | 17 mi |
Questions about 95540
What is the ZIP+4 code for 95540?
95540 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 95540, you need to look up a specific street address to get them.
What city is 95540?
95540 is assigned to Fortuna, California, in Humboldt 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.