ZIP codes in Honolulu County

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

ZIP codes

cross the county line

994,134

people in these ZIPs

counties in HI

Most people

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Honolulu County ZIP list

More counties in Hawaii

All 5 counties in Hawaii

Questions people actually ask

How many ZIP codes are in Honolulu County, Hawaii?

66 ZIP codes reach into Honolulu County, including 30 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 Honolulu County has the most people?

96706 (Ewa Beach) has about 83,692 residents, the most of any ZIP touching Honolulu County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Honolulu 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 Honolulu 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