4 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 79510 | Clyde | 8,369 |
| 79504 | Baird | 2,969 |
| 76443 | Cross Plains | 1,999 |
| 76469 | Putnam | 9 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 4 ZCTAs in Callahan County, Texas (US Census).