4 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 79027 | Dimmitt | 4,720 |
| 79043 | Hart | 1,634 |
| 79063 | Nazareth | 629 |
| 79085 | Summerfield | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 4 ZCTAs in Castro County, Texas (US Census).