ZIP Code 95377 — Tracy, CA
95377 is a standard (street delivery) ZIP code serving Tracy, California, in San Joaquin 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 95377 at a glance
| ZIP code | 95377 |
|---|---|
| Primary city | Tracy |
| State | California (CA) |
| County | San Joaquin FIPS 06077 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 37,739 |
| Coordinates | 37.652930, -121.495980 |
How ZIP+4 works in 95377
The four digits after the hyphen encode a delivery segment inside 95377. 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 95377 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 Tracy
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 95377.
| ZIP | City | Distance |
|---|---|---|
| 95304 | Tracy, CA | 5.8 mi |
| 95376 | Tracy, CA | 6.7 mi |
| 95391 | Tracy, CA | 9.6 mi |
| 94550 | Livermore, CA | 10.8 mi |
| 95385 | Vernalis, CA | 13.9 mi |
| 94514 | Byron, CA | 14.4 mi |
| 95330 | Lathrop, CA | 14.8 mi |
| 95387 | Westley, CA | 15.3 mi |
| 95337 | Manteca, CA | 15.3 mi |
| 94505 | Discovery Bay, CA | 15.5 mi |
| 94551 | Livermore, CA | 16.2 mi |
| 95206 | Stockton, CA | 17.4 mi |
Questions about 95377
What is the ZIP+4 code for 95377?
95377 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 95377, you need to look up a specific street address to get them.
What city is 95377?
95377 is assigned to Tracy, California, in San Joaquin 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.