There are 9 zip codes in Carroll County, Maryland. The most populated is 21157, located in Westminster. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
2115739,816Westminster
2178437,219Sykesville
2115823,011Westminster
2107415,146Hampstead
2110212,024Manchester
2178710,879Taneytown
210489,759Finksburg
217766,434New Windsor
217572,722Keymar

Zip Codes in Carroll County, Maryland by Population (2024)