ZIP Code 78617 — Del Valle, TX
78617 is a standard (street delivery) ZIP code serving Del Valle, Texas, in Travis 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 78617 at a glance
| ZIP code | 78617 |
|---|---|
| Primary city | Del Valle |
| State | Texas (TX) |
| County | Travis FIPS 48453 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 30,756 |
| Coordinates | 30.150800, -97.599280 |
How ZIP+4 works in 78617
The four digits after the hyphen encode a delivery segment inside 78617. 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 78617 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 78617.
| ZIP | City | Distance |
|---|---|---|
| 78719 | Austin, TX | 4.3 mi |
| 78725 | Austin, TX | 5.9 mi |
| 78742 | Austin, TX | 7.3 mi |
| 78612 | Cedar Creek, TX | 7.6 mi |
| 78744 | Austin, TX | 8 mi |
| 78747 | Austin, TX | 8.6 mi |
| 78741 | Austin, TX | 8.8 mi |
| 78721 | Austin, TX | 9.7 mi |
| 78724 | Austin, TX | 10 mi |
| 78702 | Austin, TX | 10.4 mi |
| 78722 | Austin, TX | 11.8 mi |
| 78704 | Austin, TX | 11.8 mi |
Questions about 78617
What is the ZIP+4 code for 78617?
78617 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 78617, you need to look up a specific street address to get them.
What city is 78617?
78617 is assigned to Del Valle, Texas, in Travis 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.