4 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 78606 | Blanco | 6,942 |
| 78636 | Johnson City | 3,582 |
| 78663 | Round Mountain | 599 |
| 78635 | Hye | 73 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 4 ZCTAs in Blanco County, Texas (US Census).