There are 7 zip codes in Hays County, Texas. The most populated is 78666, located in San Marcos. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
7866686,530San Marcos
7864068,265Kyle
7861044,410Buda
7873724,951Austin
7862019,893Dripping Springs
7867615,321Wimberley
786196,067Driftwood

Zip Codes in Hays County, Texas by Population (2024)