6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lakeway | 1 | 19,007 | 19,250 | -0.26% | 1,477 | 13 | City |
| Briarcliff | 2 | 2,464 | 2,077 | 3.23% | 1,566 | 2 | Village |
| Blanco | 3 | 2,173 | 1,692 | 4.62% | 623 | 3 | City |
| Johnson City | 4 | 2,172 | 1,772 | 3.82% | 1,113 | 2 | City |
| Woodcreek | 5 | 1,908 | 1,798 | 1.17% | 1,757 | 1 | City |
| Round Mountain | 6 | 121 | 104 | 2.54% | 53 | 2 | Town |
Lakeway is the largest city in Blanco County, with a population of 19,007.
Round Mountain is the smallest city in Blanco County, with a population of 121.
There are 6 cities in Blanco County, Texas.