ZIP Code 78954 — Round Top, TX
78954 is a standard (street delivery) ZIP code serving Round Top, Texas, in Fayette 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 78954 at a glance
| ZIP code | 78954 |
|---|---|
| Primary city | Round Top |
| State | Texas (TX) |
| County | Fayette FIPS 48149 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,173 |
| Coordinates | 30.045070, -96.697740 |
How ZIP+4 works in 78954
The four digits after the hyphen encode a delivery segment inside 78954. 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 78954 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 78954.
| ZIP | City | Distance |
|---|---|---|
| 78940 | Fayetteville, TX | 8.1 mi |
| 78932 | Carmine, TX | 8.3 mi |
| 78946 | Ledbetter, TX | 11 mi |
| 77835 | Burton, TX | 12.1 mi |
| 78944 | Industry, TX | 12.8 mi |
| 78945 | La Grange, TX | 14.5 mi |
| 78938 | Ellinger, TX | 15 mi |
| 78931 | Bleiblerville, TX | 15.3 mi |
| 78950 | New Ulm, TX | 15.9 mi |
| 78942 | Giddings, TX | 16.3 mi |
| 77833 | Brenham, TX | 20.7 mi |
| 78963 | West Point, TX | 21.4 mi |
Questions about 78954
What is the ZIP+4 code for 78954?
78954 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 78954, you need to look up a specific street address to get them.
What city is 78954?
78954 is assigned to Round Top, Texas, in Fayette 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.