11 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 27520 | Clayton | 48,662 |
| 27527 | Clayton | 35,968 |
| 27577 | Smithfield | 26,946 |
| 27576 | Selma | 20,104 |
| 27504 | Benson | 15,999 |
| 27524 | Four Oaks | 14,420 |
| 27542 | Kenly | 9,441 |
| 27569 | Princeton | 8,396 |
| 27568 | Pine Level | 1,563 |
| 27555 | Micro | 788 |
| 27593 | Wilsons Mills | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 11 ZCTAs in Johnston County, North Carolina (US Census).