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U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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Herkimer County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Herkimer County.

County State ZIP Code City Area Codes
Herkimer County NY 13324 Cold Brook 315, 518, 680, 838
Herkimer County NY 13329 Dolgeville 315, 518, 680, 838
Herkimer County NY 13331 Eagle Bay 315, 518, 680, 838
Herkimer County NY 13340 Frankfort 315, 680
Herkimer County NY 13350 Herkimer 315, 680
Herkimer County NY 13357 Ilion 315, 680
Herkimer County NY 13361 Jordanville 315, 518, 607, 680, 838
Herkimer County NY 13365 Little Falls 315, 518, 680, 838
Herkimer County NY 13406 Middleville 315, 680
Herkimer County NY 13407 Mohawk 315, 680
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.