There are 17 zip codes in Herkimer County, New York. The most populated is 13357, located in Ilion. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
1335710,301Ilion
133509,695Herkimer
133658,449Little Falls
133407,479Frankfort
134075,140Mohawk
134162,235Newport
134311,939Poland
133241,653Cold Brook
133381,242Forestport
134201,092Old Forge
133221,073Clayville
13454732Salisbury Center
13361661Jordanville
13406492Middleville
13472340Thendara
1333169Eagle Bay
1347539Van Hornesville

Zip Codes in Herkimer County, New York by Population (2024)