ZIP Code 76687 — Thornton, TX
76687 is a standard (street delivery) ZIP code serving Thornton, Texas, in Limestone 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 76687 at a glance
| ZIP code | 76687 |
|---|---|
| Primary city | Thornton |
| State | Texas (TX) |
| County | Limestone FIPS 48293 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,830 |
| Coordinates | 31.369140, -96.486910 |
How ZIP+4 works in 76687
The four digits after the hyphen encode a delivery segment inside 76687. 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 76687 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 76687.
| ZIP | City | Distance |
|---|---|---|
| 76653 | Kosse, TX | 8.5 mi |
| 76642 | Groesbeck, TX | 9.7 mi |
| 75838 | Donie, TX | 17 mi |
| 76629 | Bremond, TX | 18 mi |
| 75846 | Jewett, TX | 18.1 mi |
| 77865 | Marquez, TX | 18.4 mi |
| 76667 | Mexia, TX | 19.9 mi |
| 77856 | Franklin, TX | 20.6 mi |
| 76661 | Marlin, TX | 21.6 mi |
| 76680 | Reagan, TX | 22.5 mi |
| 76664 | Mart, TX | 22.5 mi |
| 75860 | Teague, TX | 22.6 mi |
Questions about 76687
What is the ZIP+4 code for 76687?
76687 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 76687, you need to look up a specific street address to get them.
What city is 76687?
76687 is assigned to Thornton, Texas, in Limestone 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.