| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lakeway | 1 | 19,014 | 19,258 | -0.07% | 1,478 | 13 | City |
| Briarcliff | 2 | 2,440 | 2,079 | 3.35% | 1,551 | 2 | Village |
| Johnson City | 3 | 2,208 | 1,761 | 3.81% | 1,132 | 2 | City |
| Blanco | 4 | 2,204 | 1,691 | 4.55% | 632 | 3 | City |
| Woodcreek | 5 | 1,899 | 1,799 | 1.23% | 1,749 | 1 | City |
| Round Mountain | 6 | 113 | 92 | 3.67% | 49 | 2 | Town |
Lakeway is the largest city in Blanco County, with a population of 19,014.
Round Mountain is the smallest city in Blanco County, with a population of 113.
There are 6 cities in Blanco County, Texas.