4 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 79510 | Clyde | 8,058 |
| 79504 | Baird | 3,181 |
| 76443 | Cross Plains | 1,828 |
| 76469 | Putnam | 73 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 4 ZCTAs in Callahan County, Texas (US Census).