There are 7 zip codes in Caldwell County, Texas. The most populated is 78644, located in Lockhart. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
7864420,088Lockhart
786168,821Dale
786488,250Luling
786553,671Martindale
786562,631Maxwell
78661437Prairie Lea
78622353Fentress
showing: 7 rows

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