7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 78666 | San Marcos | 87,775 |
| 78640 | Kyle | 71,460 |
| 78610 | Buda | 46,685 |
| 78737 | Austin | 26,413 |
| 78620 | Dripping Springs | 20,624 |
| 78676 | Wimberley | 15,896 |
| 78619 | Driftwood | 6,896 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Hays County, Texas (US Census).