ZIP Code 77550 — Galveston, TX
77550 is a standard (street delivery) ZIP code serving Galveston, Texas, in Galveston 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 77550 at a glance
| ZIP code | 77550 |
|---|---|
| Primary city | Galveston |
| State | Texas (TX) |
| County | Galveston FIPS 48167 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 23,489 |
| Coordinates | 29.310210, -94.777060 |
How ZIP+4 works in 77550
The four digits after the hyphen encode a delivery segment inside 77550. 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 77550 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 Galveston
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 77550.
| ZIP | City | Distance |
|---|---|---|
| 77555 | Galveston, TX | 0.1 mi |
| 77551 | Galveston, TX | 4.1 mi |
| 77590 | Texas City, TX | 9.7 mi |
| 77650 | Port Bolivar, TX | 10.1 mi |
| 77554 | Galveston, TX | 10.4 mi |
| 77568 | La Marque, TX | 13.3 mi |
| 77563 | Hitchcock, TX | 14.5 mi |
| 77591 | Texas City, TX | 14.8 mi |
| 77539 | Dickinson, TX | 18.1 mi |
| 77518 | Bacliff, TX | 18.5 mi |
| 77510 | Santa Fe, TX | 19.1 mi |
| 77617 | Gilchrist, TX | 21.2 mi |
Questions about 77550
What is the ZIP+4 code for 77550?
77550 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 77550, you need to look up a specific street address to get them.
What city is 77550?
77550 is assigned to Galveston, Texas, in Galveston 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.