St. Tammany County ZIP Codes
Louisiana, United States · 20 codes
St. Tammany County in Louisiana has 20 ZIP codes, from 70420 to 70471, serving 20 places.
ZIP codes in St. Tammany
Frequently asked questions
What is the ZIP code of St. Tammany?
St. Tammany has 20 ZIP codes, from 70420 to 70471. The table lists the places each one serves.
How many places are listed in St. Tammany County?
20 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.