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ZIP codes in Hunterdon County

33 ZIPs touch Hunterdon County, New Jersey. The blue dashed line is the county border; orange ZIPs reach into it.

33

ZIP codes

12

cross the county line

187,920

people in these ZIPs

21

counties in NJ

Most people

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Hunterdon County ZIP list

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Questions people actually ask

How many ZIP codes are in Hunterdon County, New Jersey?

33 ZIP codes reach into Hunterdon County, including 7 PO Box or single-address ZIPs placed by the town they serve. 12 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Hunterdon County has the most people?

08822 (Flemington) has about 32,556 residents, the most of any ZIP touching Hunterdon County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Hunterdon 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 Hunterdon 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