There are 9 zip codes in Putnam County, New York. The most populated is 10541, located in Mahopac. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
10541Mahopac26,116
10512Carmel24,256
10509Brewster19,832
10579Putnam Valley8,171
12563Patterson7,691
10516Cold Spring5,585
10524Garrison4,344
10537Lake Peekskill2,961
10542Mahopac Falls0

Putnam County, New York Zip Codes by Population (2024)