| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clyde | 1 | 4,076 | 3,821 | 1.29% | 1,241 | 3 | City |
| Baird | 2 | 1,547 | 1,480 | 0.98% | 582 | 3 | City |
| Cross Plains | 3 | 947 | 907 | 0.96% | 789 | 1 | Town |
| Putnam | 4 | 71 | 66 | 1.43% | 70 | 1 | Town |
Clyde is the largest city in Callahan County, with a population of 4,076.
Putnam is the smallest city in Callahan County, with a population of 71.
There are 4 cities in Callahan County, Texas.