4 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 79510 | Clyde | 8,135 |
| 79504 | Baird | 2,995 |
| 76443 | Cross Plains | 1,812 |
| 76469 | Putnam | 41 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 4 ZCTAs in Callahan County, Texas (US Census).