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ZIP codes in Jefferson Parish

30 ZIPs touch Jefferson Parish, Louisiana. The blue dashed line is the county border; orange ZIPs reach into it.

30

ZIP codes

0

cross the county line

430,920

people in these ZIPs

64

counties in LA

Most people

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Jefferson Parish ZIP list

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Questions people actually ask

How many ZIP codes are in Jefferson Parish, Louisiana?

30 ZIP codes reach into Jefferson Parish, including 13 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 Jefferson Parish has the most people?

70072 (Marrero) has about 55,693 residents, the most of any ZIP touching Jefferson Parish, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Jefferson Parish 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 Jefferson Parish. 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