| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Marcos | 1 | 79,808 | 68,199 | 2.54% | 1,974 | 40 | City |
| Kyle | 2 | 74,790 | 46,431 | 6.97% | 2,305 | 32 | City |
| Buda | 3 | 16,383 | 15,301 | 1.34% | 1,676 | 10 | City |
| Dripping Springs | 4 | 12,441 | 5,122 | 11.41% | 1,411 | 9 | City |
| Wimberley | 5 | 2,917 | 2,888 | 0.28% | 326 | 9 | City |
| San Leanna | 6 | 529 | 524 | -0.19% | 1,191 | 0 | Village |
| Bear Creek | 7 | 491 | 401 | 3.15% | 430 | 1 | Village |
San Marcos is the largest city in Hays County, with a population of 79,808.
Bear Creek is the smallest city in Hays County, with a population of 491.
There are 7 cities in Hays County, Texas.