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U.S. ZIP Codes Database 2026

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Rensselaer County ZIP Codes

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

County State ZIP Code City Area Codes
Rensselaer County NY 12018 Averill Park 518, 838
Rensselaer County NY 12022 Berlin 413, 518, 838
Rensselaer County NY 12028 Buskirk 518, 838
Rensselaer County NY 12033 Castleton On Hudson 518, 838
Rensselaer County NY 12040 Cherry Plain 518, 838
Rensselaer County NY 12052 Cropseyville 518, 838
Rensselaer County NY 12061 East Greenbush 518, 838
Rensselaer County NY 12062 East Nassau 518, 838
Rensselaer County NY 12063 East Schodack 518, 838
Rensselaer County NY 12082 Grafton 518, 838
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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.