ZIP Code 79521 — Haskell, TX
79521 is a standard (street delivery) ZIP code serving Haskell, Texas, in Haskell 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 79521 at a glance
| ZIP code | 79521 |
|---|---|
| Primary city | Haskell |
| State | Texas (TX) |
| County | Haskell FIPS 48207 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 3,487 |
| Coordinates | 33.124780, -99.640610 |
How ZIP+4 works in 79521
The four digits after the hyphen encode a delivery segment inside 79521. 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 79521 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 79521.
| ZIP | City | Distance |
|---|---|---|
| 76388 | Weinert, TX | 13.3 mi |
| 79503 | Avoca, TX | 16.5 mi |
| 79547 | Rule, TX | 16.5 mi |
| 79548 | Rule, TX | 17.1 mi |
| 79553 | Stamford, TX | 17.3 mi |
| 79544 | Rochester, TX | 18 mi |
| 79533 | Lueders, TX | 19.8 mi |
| 79539 | O'brien, TX | 22.3 mi |
| 76483 | Throckmorton, TX | 22.7 mi |
| 79529 | Knox City, TX | 23.7 mi |
| 79540 | Old Glory, TX | 24.5 mi |
| 76371 | Munday, TX | 25 mi |
Questions about 79521
What is the ZIP+4 code for 79521?
79521 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 79521, you need to look up a specific street address to get them.
What city is 79521?
79521 is assigned to Haskell, Texas, in Haskell 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.