There are 4 zip codes in Washington County, Kentucky. The most populated is 40069, located in Springfield. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
40069Springfield7,525
40078Willisburg3,021
40040Mackville705
40061Saint Catharine258

Washington County, Kentucky Zip Codes by Population (2024)