ZIP Code 75231 — Dallas, TX
75231 is a standard (street delivery) ZIP code serving Dallas, Texas, in Dallas 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 75231 at a glance
| ZIP code | 75231 |
|---|---|
| Primary city | Dallas |
| State | Texas (TX) |
| County | Dallas FIPS 48113 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 38,370 |
| Coordinates | 32.876950, -96.749670 |
How ZIP+4 works in 75231
The four digits after the hyphen encode a delivery segment inside 75231. 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 75231 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.
Other ZIP codes in Dallas
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 75231.
| ZIP | City | Distance |
|---|---|---|
| 75238 | Dallas, TX | 2.4 mi |
| 75225 | Dallas, TX | 2.5 mi |
| 75243 | Dallas, TX | 2.6 mi |
| 75230 | Dallas, TX | 3 mi |
| 75206 | Dallas, TX | 3.3 mi |
| 75251 | Dallas, TX | 3.3 mi |
| 75214 | Dallas, TX | 3.3 mi |
| 75218 | Dallas, TX | 3.6 mi |
| 75205 | Dallas, TX | 3.9 mi |
| 75240 | Dallas, TX | 4.4 mi |
| 75209 | Dallas, TX | 4.8 mi |
| 75042 | Garland, TX | 5 mi |
Questions about 75231
What is the ZIP+4 code for 75231?
75231 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 75231, you need to look up a specific street address to get them.
What city is 75231?
75231 is assigned to Dallas, Texas, in Dallas 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.