ZIP Code 78234 — Jbsa Ft Sam Houston, TX
78234 is a standard (street delivery) ZIP code serving Jbsa Ft Sam Houston, Texas, in Bexar 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 78234 at a glance
| ZIP code | 78234 |
|---|---|
| Primary city | Jbsa Ft Sam Houston |
| State | Texas (TX) |
| County | Bexar FIPS 48029 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 7,149 |
| Coordinates | 29.461080, -98.437150 |
How ZIP+4 works in 78234
The four digits after the hyphen encode a delivery segment inside 78234. 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 78234 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 78234.
| ZIP | City | Distance |
|---|---|---|
| 78208 | San Antonio, TX | 1.9 mi |
| 78209 | San Antonio, TX | 2.3 mi |
| 78202 | San Antonio, TX | 2.7 mi |
| 78215 | San Antonio, TX | 3 mi |
| 78218 | San Antonio, TX | 3.2 mi |
| 78212 | San Antonio, TX | 3.3 mi |
| 78219 | San Antonio, TX | 3.4 mi |
| 78203 | San Antonio, TX | 3.4 mi |
| 78205 | San Antonio, TX | 3.9 mi |
| 78220 | San Antonio, TX | 3.9 mi |
| 78210 | San Antonio, TX | 4.8 mi |
| 78244 | San Antonio, TX | 5.3 mi |
Questions about 78234
What is the ZIP+4 code for 78234?
78234 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 78234, you need to look up a specific street address to get them.
What city is 78234?
78234 is assigned to Jbsa Ft Sam Houston, Texas, in Bexar 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.