ZIP Code 78391 — Tynan, TX
78391 is a standard (street delivery) ZIP code serving Tynan, Texas, in Bee 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 78391 at a glance
| ZIP code | 78391 |
|---|---|
| Primary city | Tynan |
| State | Texas (TX) |
| County | Bee FIPS 48025 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 77 |
| Coordinates | 28.182970, -97.727430 |
How ZIP+4 works in 78391
The four digits after the hyphen encode a delivery segment inside 78391. 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 78391 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 78391.
| ZIP | City | Distance |
|---|---|---|
| 78389 | Skidmore, TX | 5.6 mi |
| 78368 | Mathis, TX | 7.1 mi |
| 78387 | Sinton, TX | 12.7 mi |
| 78352 | Edroy, TX | 14.1 mi |
| 78383 | Sandia, TX | 15.1 mi |
| 78102 | Beeville, TX | 15.6 mi |
| 78370 | Odem, TX | 18.2 mi |
| 78393 | Woodsboro, TX | 22.7 mi |
| 78104 | Beeville, TX | 23.6 mi |
| 78142 | Normanna, TX | 24.9 mi |
| 78410 | Corpus Christi, TX | 25.2 mi |
| 78372 | Orange Grove, TX | 25.8 mi |
Questions about 78391
What is the ZIP+4 code for 78391?
78391 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 78391, you need to look up a specific street address to get them.
What city is 78391?
78391 is assigned to Tynan, Texas, in Bee 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.