ZIP Code 95203 — Stockton, CA
95203 is a standard (street delivery) ZIP code serving Stockton, 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 95203 at a glance
| ZIP code | 95203 |
|---|---|
| Primary city | Stockton |
| State | California (CA) |
| County | San Joaquin FIPS 06077 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 15,930 |
| Coordinates | 37.952370, -121.330980 |
How ZIP+4 works in 95203
The four digits after the hyphen encode a delivery segment inside 95203. 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 95203 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 Stockton
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 95203.
| ZIP | City | Distance |
|---|---|---|
| 95204 | Stockton, CA | 1.6 mi |
| 95211 | Stockton, CA | 2.2 mi |
| 95202 | Stockton, CA | 2.4 mi |
| 95207 | Stockton, CA | 3.5 mi |
| 95205 | Stockton, CA | 4 mi |
| 95210 | Stockton, CA | 5.8 mi |
| 95206 | Stockton, CA | 5.8 mi |
| 95231 | French Camp, CA | 5.8 mi |
| 95209 | Stockton, CA | 6.6 mi |
| 95212 | Stockton, CA | 8.7 mi |
| 95215 | Stockton, CA | 9.7 mi |
| 95330 | Lathrop, CA | 9.8 mi |
Questions about 95203
What is the ZIP+4 code for 95203?
95203 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 95203, you need to look up a specific street address to get them.
What city is 95203?
95203 is assigned to Stockton, 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.