4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clyde | 1 | 4,166 | 3,820 | 1.41% | 1,269 | 3 | City |
| Baird | 2 | 1,578 | 1,479 | 1.09% | 594 | 3 | City |
| Cross Plains | 3 | 970 | 906 | 1.15% | 808 | 1 | Town |
| Putnam | 4 | 80 | 71 | 2.56% | 79 | 1 | Town |
Clyde is the largest city in Callahan County, with a population of 4,166.
Putnam is the smallest city in Callahan County, with a population of 80.
There are 4 cities in Callahan County, Texas.