ZIP Code 77428 is located in Collegeport Texas. 77428 is entirely within Matagorda County.
| ZIP Code Name | Collegeport |
| Primary County | Matagorda County |
| ZIP Code Type | PO Box |
| Population (2022) | 94 |
| Area Code(s) | 361 |
| Current Time | CST |
| Population | 94 |
| Population Density | 3 People per Square Mile |
| Current Unemployment Rate (November 2024) | 4.1% |
| Coordinates | 28.72299957,-96.17700195 |
| Adjacent ZIP Codes | |
| Metropolitan/Micropolitan Stat Area | Bay City, TX |
| Time Zone | Central Standard Time |
| IANA Timezone | America/Chicago |
| Area | 34 Square Miles |