10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Marcos | 1 | 73,803 | 68,217 | 1.54% | 1,899 | 38.87 | City |
| Kyle | 2 | 73,274 | 46,458 | 7.9% | 2,258 | 32.45 | City |
| Buda | 3 | 16,528 | 15,282 | 1.53% | 1,727 | 9.57 | City |
| Dripping Springs | 4 | 11,073 | 5,112 | 12.06% | 1,256 | 8.81 | City |
| Belterra | 5 | 8,348 | 5,698 | 7.15% | 3,560 | 2.35 | CDP |
| Shady Hollow | 6 | 5,374 | 3,833 | 0.47% | 2,481 | 2.17 | CDP |
| Wimberley | 7 | 2,881 | 2,881 | 0% | 322 | 8.96 | City |
| San Leanna | 8 | 499 | 524 | -0.99% | 1,124 | 0.44 | Village |
| Bear Creek | 9 | 479 | 399 | 3.46% | 420 | 1.14 | Village |
| Driftwood | 10 | 109 | 131 | -1.8% | 84 | 1.29 | CDP |
San Marcos is the largest city in Hays County, with a population of 73,803.
Driftwood is the smallest city in Hays County.
There are 10 cities in Hays County, Texas.