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ZIP codes in Ulster County

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

66

ZIP codes

16

cross the county line

205,576

people in these ZIPs

62

counties in NY

Most people

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Ulster County ZIP list

More counties in New York

All 62 counties in New York

Questions people actually ask

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

66 ZIP codes reach into Ulster County, including 3 PO Box or single-address ZIPs placed by the town they serve. 16 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Ulster County has the most people?

12401 (Kingston) has about 35,136 residents, the most of any ZIP touching Ulster County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Ulster 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 Ulster 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