ZIP codes in Nassau County
8 ZIPs touch Nassau County, Florida. The blue dashed line is the county border; orange ZIPs reach into it.
8
ZIP codes
1
cross the county line
107,466
people in these ZIPs
67
counties in FL
Most people
Nassau County ZIP list
More counties in Florida
- Madison County6
- Manatee County32
- Marion County45
- Martin County17
- Miami-Dade County128
- Monroe County14
- Okaloosa County20
- Okeechobee County2
- Orange County82
- Osceola County20
- Palm Beach County76
- Pasco County42
Questions people actually ask
How many ZIP codes are in Nassau County, Florida?
8 ZIP codes reach into Nassau County, including 2 PO Box or single-address ZIPs placed by the town they serve. 1 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Nassau County has the most people?
32034 (Fernandina Beach) has about 41,029 residents, the most of any ZIP touching Nassau County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Nassau 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 Nassau 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