There are 4 zip codes in Union County, South Carolina. The most populated is 29379, located in Union. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
2937917,380Union
293533,483Jonesville
293213,248Buffalo
29364557Lockhart

Zip Codes in Union County, South Carolina by Population (2024)