| Post Office Name | US Post Office |
| Address | 103 N Manautou St |
| City | Port Isabel |
| State | Texas |
| Phone Number | (800) 275-8777 |
| Latitude | 26.0776 |
| Longitude | -97.3389 |
78578 US Post Office in Port Isabel, Texas is located at 103 N Manautou St. The Port Isabel Post Office Number is (800) 275-8777
