About ZIP code 78666
The ZIP code 78666 routes mail to San Marcos in the Texas region of United States. Use it as the postal segment of any address in this area, and confirm unusual addresses with the local postal operator.
United States ยท ZIP code
78666 - San Marcos
ZIP code 78666 is San Marcos in Texas, United States.
| ZIP code | 78666 |
| Place | San Marcos |
| Region | Texas |
| District | Hays |
| Country | United States (US) |
| Coordinates | 29.8754, -97.9404 (map) |