 | Airports: United States: San Marcos Municipal Airport | |
| Airport name: | San Marcos Municipal Airport |
| Airport code (ICAO): | KHYI |
| Latitude: | 29.8927 |
| Longitude: | -97.8630 |
| Height above sea: | 597 ft / 181 m |
| Country: | United States - North America |
| Region: | Texas |
| City: | San Marcos |
| Airlines scheduled services: | no |