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U.S. ZIP Codes Database 2026

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St. Tammany Parish ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in St. Tammany Parish.

County State ZIP Code City Area Codes
St. Tammany Parish LA 70420 Abita Springs 985
St. Tammany Parish LA 70431 Bush 985
St. Tammany Parish LA 70433 Covington 985
St. Tammany Parish LA 70434 Covington 985
St. Tammany Parish LA 70435 Covington 985
St. Tammany Parish LA 70437 Folsom 985
St. Tammany Parish LA 70445 Lacombe 985
St. Tammany Parish LA 70447 Madisonville 985
St. Tammany Parish LA 70448 Mandeville 985
St. Tammany Parish LA 70452 Pearl River 601, 769, 985
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.