There are 11 zip codes in Johnston County, North Carolina. The most populated is 27520, located in Clayton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
2752046,059Clayton
2752734,321Clayton
2757726,778Smithfield
2757620,011Selma
2750415,057Benson
2752413,976Four Oaks
275429,610Kenly
275698,963Princeton
275681,509Pine Level
27555477Micro
275930Wilsons Mills

Zip Codes in Johnston County, North Carolina by Population (2024)