ZIP Code 75640 — Diana, TX
75640 is a standard (street delivery) ZIP code serving Diana, Texas, in Harrison 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 75640 at a glance
| ZIP code | 75640 |
|---|---|
| Primary city | Diana |
| State | Texas (TX) |
| County | Harrison FIPS 48203 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 6,142 |
| Coordinates | 32.715200, -94.681330 |
How ZIP+4 works in 75640
The four digits after the hyphen encode a delivery segment inside 75640. 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 75640 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 75640.
| ZIP | City | Distance |
|---|---|---|
| 75683 | Ore City, TX | 8.1 mi |
| 75605 | Longview, TX | 9.3 mi |
| 75651 | Harleton, TX | 9.3 mi |
| 75645 | Gilmer, TX | 11.3 mi |
| 75630 | Avinger, TX | 13.2 mi |
| 75668 | Lone Star, TX | 13.3 mi |
| 75601 | Longview, TX | 14.5 mi |
| 75650 | Hallsville, TX | 15.7 mi |
| 75693 | White Oak, TX | 16.3 mi |
| 75604 | Longview, TX | 16.3 mi |
| 75602 | Longview, TX | 17.8 mi |
| 75670 | Marshall, TX | 18.2 mi |
Questions about 75640
What is the ZIP+4 code for 75640?
75640 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 75640, you need to look up a specific street address to get them.
What city is 75640?
75640 is assigned to Diana, Texas, in Harrison 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.