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ZIP codes in Kauai County

17 ZIPs touch Kauai County, Hawaii. The blue dashed line is the county border; orange ZIPs reach into it.

17

ZIP codes

0

cross the county line

73,731

people in these ZIPs

5

counties in HI

Most people

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Kauai County ZIP list

More counties in Hawaii

All 5 counties in Hawaii

Questions people actually ask

How many ZIP codes are in Kauai County, Hawaii?

17 ZIP codes reach into Kauai County, including 1 PO Box or single-address ZIPs placed by the town they serve. Every ZIP area here lies wholly inside the county.

Which ZIP code in Kauai County has the most people?

96746 (Kapaa) has about 19,329 residents, the most of any ZIP touching Kauai County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Kauai 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 Kauai 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