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ZIP codes in Nantucket County

3 ZIPs touch Nantucket County, Massachusetts. The blue dashed line is the county border; orange ZIPs reach into it.

3

ZIP codes

0

cross the county line

14,483

people in these ZIPs

14

counties in MA

Most people

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Nantucket County ZIP list

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Questions people actually ask

How many ZIP codes are in Nantucket County, Massachusetts?

3 ZIP codes reach into Nantucket County. Every ZIP area here lies wholly inside the county.

Which ZIP code in Nantucket County has the most people?

02554 (Nantucket) has about 14,212 residents, the most of any ZIP touching Nantucket County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Nantucket 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 Nantucket 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