ZIP Code 78330 — Agua Dulce, TX
78330 is a standard (street delivery) ZIP code serving Agua Dulce, 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 78330 at a glance
| ZIP code | 78330 |
|---|---|
| Primary city | Agua Dulce |
| State | Texas (TX) |
| County | Nueces FIPS 48355 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 351 |
| Coordinates | 27.765600, -97.913780 |
How ZIP+4 works in 78330
The four digits after the hyphen encode a delivery segment inside 78330. 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 78330 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 78330.
| ZIP | City | Distance |
|---|---|---|
| 78339 | Banquete, TX | 7.9 mi |
| 78380 | Robstown, TX | 10.9 mi |
| 78351 | Driscoll, TX | 11.9 mi |
| 78342 | Ben Bolt, TX | 12.3 mi |
| 78343 | Bishop, TX | 13.2 mi |
| 78332 | Alice, TX | 13.7 mi |
| 78372 | Orange Grove, TX | 19.5 mi |
| 78352 | Edroy, TX | 20.2 mi |
| 78410 | Corpus Christi, TX | 20.2 mi |
| 78383 | Sandia, TX | 21.6 mi |
| 78370 | Odem, TX | 22.5 mi |
| 78363 | Kingsville, TX | 22.9 mi |
Questions about 78330
What is the ZIP+4 code for 78330?
78330 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 78330, you need to look up a specific street address to get them.
What city is 78330?
78330 is assigned to Agua Dulce, 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.