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ZIP codes in Suffolk County

116 ZIPs touch Suffolk County, New York. The blue dashed line is the county border; orange ZIPs reach into it.

116

ZIP codes

2

cross the county line

1,530,419

people in these ZIPs

62

counties in NY

Most people

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Suffolk County ZIP list

More counties in New York

All 62 counties in New York

Questions people actually ask

How many ZIP codes are in Suffolk County, New York?

116 ZIP codes reach into Suffolk County, including 7 PO Box or single-address ZIPs placed by the town they serve. 2 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Suffolk County has the most people?

11706 (Bay Shore) has about 68,976 residents, the most of any ZIP touching Suffolk County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Suffolk County and another county?

Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Suffolk County. For one address, pin the exact spot on the ZIP finder to see its county.

Where does this list come from?

ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.

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Updated 2026-11-10 · Where the data comes from