ZIP Code 95310 — Columbia, CA
95310 is a standard (street delivery) ZIP code serving Columbia, California, in Tuolumne 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 95310 at a glance
| ZIP code | 95310 |
|---|---|
| Primary city | Columbia |
| State | California (CA) |
| County | Tuolumne FIPS 06109 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 1,356 |
| Coordinates | 38.099440, -120.361710 |
How ZIP+4 works in 95310
The four digits after the hyphen encode a delivery segment inside 95310. 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 95310 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 95310.
| ZIP | City | Distance |
|---|---|---|
| 95247 | Murphys, CA | 5.4 mi |
| 95251 | Vallecito, CA | 5.4 mi |
| 95233 | Hathaway Pines, CA | 6 mi |
| 95383 | Twain Harte, CA | 7.4 mi |
| 95370 | Sonora, CA | 8 mi |
| 95224 | Avery, CA | 9 mi |
| 95372 | Soulsbyville, CA | 9.3 mi |
| 95221 | Altaville, CA | 10.3 mi |
| 95346 | Mi Wuk Village, CA | 10.4 mi |
| 95246 | Mountain Ranch, CA | 11.9 mi |
| 95379 | Tuolumne, CA | 12.4 mi |
| 95222 | Angels Camp, CA | 14.2 mi |
Questions about 95310
What is the ZIP+4 code for 95310?
95310 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 95310, you need to look up a specific street address to get them.
What city is 95310?
95310 is assigned to Columbia, California, in Tuolumne 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.