ZIP Code 78503 — Mcallen, TX
78503 is a standard (street delivery) ZIP code serving Mcallen, Texas, in Hidalgo 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 78503 at a glance
| ZIP code | 78503 |
|---|---|
| Primary city | Mcallen |
| State | Texas (TX) |
| County | Hidalgo FIPS 48215 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 22,621 |
| Coordinates | 26.162290, -98.251320 |
How ZIP+4 works in 78503
The four digits after the hyphen encode a delivery segment inside 78503. 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 78503 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 Mcallen
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 78503.
| ZIP | City | Distance |
|---|---|---|
| 78557 | Hidalgo, TX | 3.7 mi |
| 78501 | Mcallen, TX | 3.8 mi |
| 78577 | Pharr, TX | 3.8 mi |
| 78589 | San Juan, TX | 5.7 mi |
| 78572 | Mission, TX | 7 mi |
| 78504 | Mcallen, TX | 8 mi |
| 78516 | Alamo, TX | 8.3 mi |
| 78539 | Edinburg, TX | 9.2 mi |
| 78573 | Mission, TX | 9.8 mi |
| 78537 | Donna, TX | 12 mi |
| 78574 | Mission, TX | 12.7 mi |
| 78596 | Weslaco, TX | 16.1 mi |
Questions about 78503
What is the ZIP+4 code for 78503?
78503 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 78503, you need to look up a specific street address to get them.
What city is 78503?
78503 is assigned to Mcallen, Texas, in Hidalgo 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.