ZIP Code 95604 — Auburn, CA
95604 is a standard (street delivery) ZIP code serving Auburn, California, in Placer 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 95604 at a glance
| ZIP code | 95604 |
|---|---|
| Primary city | Auburn |
| State | California (CA) |
| County | Placer FIPS 06061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 27 |
| Coordinates | 38.911200, -121.098200 |
How ZIP+4 works in 95604
The four digits after the hyphen encode a delivery segment inside 95604. 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 95604 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.
Other ZIP codes in Auburn
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 95604.
| ZIP | City | Distance |
|---|---|---|
| 95603 | Auburn, CA | 0.7 mi |
| 95658 | Newcastle, CA | 3.6 mi |
| 95602 | Auburn, CA | 5.5 mi |
| 95663 | Penryn, CA | 5.9 mi |
| 95614 | Cool, CA | 6.1 mi |
| 95722 | Meadow Vista, CA | 7.4 mi |
| 95650 | Loomis, CA | 7.7 mi |
| 95703 | Applegate, CA | 8.2 mi |
| 95664 | Pilot Hill, CA | 8.2 mi |
| 95635 | Greenwood, CA | 10.6 mi |
| 95651 | Lotus, CA | 10.7 mi |
| 95677 | Rocklin, CA | 10.8 mi |
Questions about 95604
What is the ZIP+4 code for 95604?
95604 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 95604, you need to look up a specific street address to get them.
What city is 95604?
95604 is assigned to Auburn, California, in Placer 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.