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
City
Population
13357Ilion10,301
13350Herkimer9,695
13365Little Falls8,449
13340Frankfort7,479
13407Mohawk5,140
13416Newport2,235
13431Poland1,939
13324Cold Brook1,653
13338Forestport1,242
13420Old Forge1,092
13322Clayville1,073
13454Salisbury Center732
13361Jordanville661
13406Middleville492
13472Thendara340
13331Eagle Bay69
13475Van Hornesville39

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