ZIP codes in Monroe County
14 ZIPs touch Monroe County, Florida. The blue dashed line is the county border; orange ZIPs reach into it.
14
ZIP codes
2
cross the county line
105,797
people in these ZIPs
67
counties in FL
Most people
Monroe County ZIP list
More counties in Florida
- Liberty County3
- Madison County6
- Manatee County32
- Marion County45
- Martin County17
- Miami-Dade County128
- Nassau County8
- Okaloosa County20
- Okeechobee County2
- Orange County82
- Osceola County20
- Palm Beach County76
Questions people actually ask
How many ZIP codes are in Monroe County, Florida?
14 ZIP codes reach into Monroe County, including 3 PO Box or single-address ZIPs placed by the town they serve. 2 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Monroe County has the most people?
33040 (Key West) has about 35,429 residents, the most of any ZIP touching Monroe County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Monroe 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 Monroe 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