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Mahopac CDP, NY

ZIP Code 10542 — Mahopac CDP, NY Demographics & Data

Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.

Map, Quick Facts & Location

Quick Facts

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City
Mahopac CDP
County
Putnam County
NY
Timezone
EST(America/New_York)
Area Code
329, 845
Congress
NY-17
DMA
NEW YORK (501)
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Location
Coordinates
42.1657, -74.9481
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Timezone
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Overview of ZIP Code 10542

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What to know about ZIP 10542

ZIP code 10542 covers Mahopac, NY in Putnam County.

It sits in telephone area codes 329, 845; U.S. House district NY-17; the NEW YORK media market.

Climate risk and migration signals

FEMA’s National Risk Index rates natural-hazard risk for Mahopac CDP, NY as Very Low (composite score 39.8), which is relatively lower than many U.S. communities. The strongest component scores on US5 are hurricane (73.2) and flood (57.4). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.

Climate normals for Mahopac CDP, NY show limited published climate normals on US5.