ZIP Code 78021 — Fowlerton, TX
78021 is a standard (street delivery) ZIP code serving Fowlerton, Texas, in La Salle 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 78021 at a glance
| ZIP code | 78021 |
|---|---|
| Primary city | Fowlerton |
| State | Texas (TX) |
| County | La Salle FIPS 48283 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 165 |
| Coordinates | 28.431800, -98.834890 |
How ZIP+4 works in 78021
The four digits after the hyphen encode a delivery segment inside 78021. 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 78021 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 78021.
| ZIP | City | Distance |
|---|---|---|
| 78014 | Cotulla, TX | 16.8 mi |
| 78072 | Tilden, TX | 16.9 mi |
| 78011 | Charlotte, TX | 26.3 mi |
| 78007 | Calliham, TX | 26.4 mi |
| 78001 | Artesia Wells, TX | 26.8 mi |
| 78026 | Jourdanton, TX | 28.3 mi |
| 78017 | Dilley, TX | 30.2 mi |
| 78012 | Christine, TX | 32.2 mi |
| 78005 | Bigfoot, TX | 34.3 mi |
| 78075 | Whitsett, TX | 36 mi |
| 78061 | Pearsall, TX | 37.1 mi |
| 78357 | Freer, TX | 38.2 mi |
Questions about 78021
What is the ZIP+4 code for 78021?
78021 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 78021, you need to look up a specific street address to get them.
What city is 78021?
78021 is assigned to Fowlerton, Texas, in La Salle 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.