U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
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State directory

Louisiana ZIP Codes

Complete postal directory, details, and geographic map for the State of Louisiana.

State ZIP Code City County Area Codes
LA 70449 Maurepas Livingston Parish 225
LA 70450 Mount Hermon Washington Parish 601, 769, 985
LA 70451 Natalbany Tangipahoa Parish 985
LA 70452 Pearl River St. Tammany Parish 601, 769, 985
LA 70453 Pine Grove St. Helena Parish 225, 985
LA 70454 Ponchatoula Tangipahoa Parish 225, 985
LA 70455 Robert Tangipahoa Parish 985
LA 70456 Roseland Tangipahoa Parish 985
LA 70457 Saint Benedict St. Tammany Parish 985
LA 70458 Slidell St. Tammany Parish 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.