10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lockhart | 1 | 15,960 | 14,354 | 2.05% | 1,022 | 15.61 | City |
| Luling | 2 | 5,868 | 5,583 | 0.98% | 1,065 | 5.51 | City |
| Redwood | 3 | 3,194 | 3,349 | -2.32% | 496 | 6.45 | CDP |
| Uhland | 4 | 1,965 | 1,605 | 3.8% | 706 | 2.79 | City |
| Martindale | 5 | 1,260 | 1,250 | 0.16% | 611 | 2.06 | City |
| Mustang Ridge | 6 | 1,004 | 951 | 1.11% | 269 | 3.73 | City |
| Mountain City | 7 | 706 | 631 | 2.17% | 1,342 | 0.53 | City |
| Niederwald | 8 | 691 | 661 | 0.88% | 188 | 3.67 | City |
| Creedmoor | 9 | 402 | 459 | -2.66% | 53 | 7.62 | City |
| Hays | 10 | 276 | 233 | 3.37% | 1,238 | 0.22 | City |
Lockhart is the largest city in Caldwell County, with a population of 15,960.
Hays is the smallest city in Caldwell County.
There are 10 cities in Caldwell County, Texas.