| Zip Code | City | Population ↓ |
|---|---|---|
| 78639 | Kingsland | 8,274 |
| 78657 | Horseshoe Bay | 6,958 |
| 78643 | Llano | 6,811 |
| 78609 | Buchanan Dam | 1,880 |
| 78672 | Tow | 687 |
| 78607 | Bluffton | 208 |
| 76885 | Valley Spring | 65 |
| 76831 | Castell | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Llano County, Texas (US Census).