There are 4 zip codes in Rockcastle County, Kentucky. The most populated is 40456, located in Mount Vernon. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
40456Mount Vernon8,574
40409Brodhead3,667
40460Orlando1,162
40445Livingston926

Rockcastle County, Kentucky Zip Codes by Population (2024)