US States Zip Directory 2026

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Louisiana Zip Codes



Louisiana Louisiana is a state located in the southern region of the United States of America. Louisiana is the 31st most extensive and the 25th most populous of the 50 United States. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties. The largest parish by population is East Baton Rouge Parish, and the largest by land area is Cameron Parish.

Much of the state was formed from sediment washed down the Mississippi River, leaving enormous deltas and vast areas of coastal marsh and swamp. These contain a rich southern biota; typical examples include birds such as ibis and egrets. There are also many species of tree frogs, and fish such as sturgeon and paddlefish. In more elevated areas, fire is a natural process in the landscape, and has produced extensive areas of longleaf pine forest and wet savannas. These support an exceptionally large number of plant species including many species of orchids and carnivorus plants.

State Zip Code City County Area Codes
LA 70031 Ama St. Charles Parish 504, 985
LA 70032 Arabi St. Bernard Parish 504
LA 70033 Metairie Jefferson Parish 504
LA 70036 Barataria Jefferson Parish 504, 985
LA 70037 Belle Chasse Plaquemines Parish 504, 985
LA 70038 Boothville Plaquemines Parish 985
LA 70039 Boutte St. Charles Parish 985
LA 70040 Braithwaite Plaquemines Parish 504, 985
LA 70041 Buras Plaquemines Parish 504, 985
LA 70043 Chalmette St. Bernard Parish 504
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Map of Louisiana


ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone. The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired.


ZIP codes designate only delivery points within the United States and its dependencies, as well as locations of its armed forces. There are no ZIP codes reserved for designating mail bound for foreign destinations (with the exception of U.S. military units stationed outside of the United States), and therefore, international outbound mail should not include a ZIP code in the delivery address. The last line of a foreign address must only show the name of the country of destination.