ZIP Code 78675 — Willow City, TX
78675 is a standard (street delivery) ZIP code serving Willow City, Texas, in Gillespie 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 78675 at a glance
| ZIP code | 78675 |
|---|---|
| Primary city | Willow City |
| State | Texas (TX) |
| County | Gillespie FIPS 48171 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 102 |
| Coordinates | 30.458500, -98.705340 |
How ZIP+4 works in 78675
The four digits after the hyphen encode a delivery segment inside 78675. 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 78675 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 78675.
| ZIP | City | Distance |
|---|---|---|
| 78624 | Fredericksburg, TX | 15.1 mi |
| 78643 | Llano, TX | 15.4 mi |
| 78671 | Stonewall, TX | 18.1 mi |
| 78636 | Johnson City, TX | 19.4 mi |
| 78635 | Hye, TX | 19.6 mi |
| 78657 | Horseshoe Bay, TX | 20.1 mi |
| 78639 | Kingsland, TX | 20.3 mi |
| 78663 | Round Mountain, TX | 23.6 mi |
| 76831 | Castell, TX | 24.8 mi |
| 78609 | Buchanan Dam, TX | 25.6 mi |
| 78618 | Doss, TX | 27.6 mi |
| 78607 | Bluffton, TX | 28.1 mi |
Questions about 78675
What is the ZIP+4 code for 78675?
78675 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 78675, you need to look up a specific street address to get them.
What city is 78675?
78675 is assigned to Willow City, Texas, in Gillespie 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.