ZIP Code 78380 — Robstown, TX
78380 is a standard (street delivery) ZIP code serving Robstown, Texas, in Nueces 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 78380 at a glance
| ZIP code | 78380 |
|---|---|
| Primary city | Robstown |
| State | Texas (TX) |
| County | Nueces FIPS 48355 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 23,149 |
| Coordinates | 27.778720, -97.736300 |
How ZIP+4 works in 78380
The four digits after the hyphen encode a delivery segment inside 78380. 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 78380 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 78380.
| ZIP | City | Distance |
|---|---|---|
| 78339 | Banquete, TX | 3.7 mi |
| 78351 | Driscoll, TX | 7.7 mi |
| 78410 | Corpus Christi, TX | 9.6 mi |
| 78330 | Agua Dulce, TX | 10.9 mi |
| 78343 | Bishop, TX | 11.1 mi |
| 78406 | Corpus Christi, TX | 13.5 mi |
| 78409 | Corpus Christi, TX | 13.8 mi |
| 78370 | Odem, TX | 13.9 mi |
| 78352 | Edroy, TX | 14.3 mi |
| 78417 | Corpus Christi, TX | 16.6 mi |
| 78415 | Corpus Christi, TX | 17.5 mi |
| 78407 | Corpus Christi, TX | 17.7 mi |
Questions about 78380
What is the ZIP+4 code for 78380?
78380 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 78380, you need to look up a specific street address to get them.
What city is 78380?
78380 is assigned to Robstown, Texas, in Nueces 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.