ZIP Code 78666 – San Marcos, Texas
The 78666 ZIP Code belongs to San Marcos, Texas. The population in this 78666 ZIP code is 87,775. The latitude is 29.8826 and longitude is -97.97974 in 78666 San Marcos, Texas. The time zone for this 78666 ZIP code is America/Chicago.
| City | San Marcos |
| Zip Code | 78666 |
| State | Texas |
| County | Hays |
| Population | 87,775 |
| Latitude | 29.8826 |
| Longitude | -97.97974 |
| Time Zone | America/Chicago |