There are 8 zip codes in Caroline County, Maryland. The most populated is 21629, located in Denton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
21629Denton9,988
21632Federalsburg6,504
21655Preston4,753
21639Greensboro4,734
21660Ridgely4,100
21640Henderson1,374
21636Goldsboro824
21641Hillsboro149

Caroline County, Maryland Zip Codes by Population (2024)