Founded in 1838, Galveston County is one of 254 counties in the state of Texas. Historically, Galveston County was formed from Brazoria County, Harris County and Liberty County. The city of Galveston is the county seat. With FIPS code of 167, Galveston County has a population of 355,062 and area of 399 square miles (1,033 km2).
List of all cities in Galveston County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Alta Loma, TX | 77510 | 409 |
| Arcadia, TX | 77517 | 409 |
| Bacliff, TX | 77518 | 713/281/832 |
| Bayou Vista, TX | 77563 | 409 |
| Bolivar, TX | 77650 | 409 |
| Caplen, TX | 77617 | 409 |
| Clear Lake Shores, TX | 77565 | 713/281/832 |
| Crystal Beach, TX | 77650 | 409 |
| Dickinson, TX | 77539 | 713/281/832 |
| Friendswood, TX | 77546 | 713/281/832 |
| 77549 | 713/281/832 | |
| Galveston, TX | 77550 | 409 |
| 77551 | 409 | |
| 77552 | 409 | |
| 77553 | 409 | |
| 77554 | 409 | |
| 77555 | 409 | |
| Gilchrist, TX | 77617 | 409 |
| High Island, TX | 77623 | 409 |
| Hitchcock, TX | 77563 | 409 |
| Island, TX | 77550 | 409 |
| Jamaica Beach, TX | 77550 | 409 |
| 77554 | 409 | |
| Kemah, TX | 77565 | 713/281/832 |
| La Marque, TX | 77568 | 409 |
| League City, TX | 77573 | 713/281/832 |
| 77574 | 713/281/832 | |
| Port Bolivar, TX | 77650 | 409 |
| San Leon, TX | 77539 | 713/281/832 |
| Santa Fe, TX | 77510 | 409 |
| 77517 | 409 | |
| Texas City, TX | 77590 | 409 |
| 77591 | 409 | |
| 77592 | 409 | |
| Tiki Island, TX | 77554 | 409 |
| U of T Med Br at Galveston, TX | 77555 | 409 |
| Virginia Point, TX | 77550 | 409 |
| West Galveston, TX | 77554 | 409 |
| West Texas City, TX | 77590 | 409 |
| 77591 | 409 |