There are 14 zip codes in Coos County, New Hampshire. The most populated is 3570, located in Berlin. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
035709,485Berlin
035983,463Whitefield
035843,440Lancaster
035813,285Gorham
035762,660Colebrook
035822,062Groveton
035881,609Milan
035901,193North Stratford
035921,023Pittsburg
03583972Jefferson
03595795Twin Mountain
03597670West Stewartstown
03593408Randolph
035750Bretton Woods

Zip Codes in Coos County, New Hampshire by Population (2024)