ZIP Code 76645 — Hillsboro, TX
76645 is a standard (street delivery) ZIP code serving Hillsboro, Texas, in Hill 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 76645 at a glance
| ZIP code | 76645 |
|---|---|
| Primary city | Hillsboro |
| State | Texas (TX) |
| County | Hill FIPS 48217 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 11,494 |
| Coordinates | 32.012240, -97.128160 |
How ZIP+4 works in 76645
The four digits after the hyphen encode a delivery segment inside 76645. 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 76645 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 76645.
| ZIP | City | Distance |
|---|---|---|
| 76628 | Brandon, TX | 9.2 mi |
| 76621 | Abbott, TX | 9.6 mi |
| 76631 | Bynum, TX | 9.9 mi |
| 76055 | Itasca, TX | 10.2 mi |
| 76670 | Milford, TX | 11.5 mi |
| 76692 | Whitney, TX | 12.6 mi |
| 76676 | Penelope, TX | 13.9 mi |
| 76666 | Mertens, TX | 14 mi |
| 76636 | Covington, TX | 14.3 mi |
| 76660 | Malone, TX | 14.9 mi |
| 76622 | Aquilla, TX | 15 mi |
| 76650 | Irene, TX | 15.4 mi |
Questions about 76645
What is the ZIP+4 code for 76645?
76645 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 76645, you need to look up a specific street address to get them.
What city is 76645?
76645 is assigned to Hillsboro, Texas, in Hill 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.