4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clyde | 1 | 4,108 | 3,820 | 1.41% | 1,251 | 3 | City |
| Baird | 2 | 1,561 | 1,479 | 1.04% | 588 | 3 | City |
| Cross Plains | 3 | 959 | 906 | 1.05% | 799 | 1 | Town |
| Putnam | 4 | 78 | 71 | 1.3% | 77 | 1 | Town |
Clyde is the largest city in Callahan County, with a population of 4,108.
Putnam is the smallest city in Callahan County, with a population of 78.
There are 4 cities in Callahan County, Texas.