ZIP codes in St. Martin Parish
9 ZIPs touch St. Martin Parish, Louisiana. The blue dashed line is the county border; orange ZIPs reach into it.
9
ZIP codes
7
cross the county line
135,680
people in these ZIPs
64
counties in LA
Most people
St. Martin Parish ZIP list
More counties in Louisiana
- St. Bernard Parish7
- St. Charles Parish12
- St. Helena Parish7
- St. James Parish9
- St. John the Baptist Parish7
- St. Landry Parish20
- St. Mary Parish11
- St. Tammany Parish22
- Tangipahoa Parish22
- Tensas Parish4
- Terrebonne Parish14
- Union Parish9
Questions people actually ask
How many ZIP codes are in St. Martin Parish, Louisiana?
9 ZIP codes reach into St. Martin Parish, including 1 PO Box or single-address ZIPs placed by the town they serve. 7 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in St. Martin Parish has the most people?
70560 (New Iberia) has about 36,996 residents, the most of any ZIP touching St. Martin Parish, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in St. Martin 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 St. Martin 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