Ile-de-France postal codes — France

Île-de-France is the capital region of France, in the north-central part of the country. It contains Paris, the national capital, and is the seat of national government and administration.

Beyond Paris, the region's main towns include Pontoise, Etampes, Le Raincy, Mantes-la-Jolie and L'Hay-les-Roses — each the chef-lieu of an arrondissement, surrounded by the communes whose postal codes are listed above.

Administrative structure

France is organised into three administrative levels: the région, the département, and the commune. Ile-de-France is a région; below it are the départements listed here, each divided into communes:

• 75 Paris
• 77 Seine-et-Marne
• 78 Yvelines
• 91 Essonne
• 92 Hauts-de-Seine
• 93 Seine-Saint-Denis
• 94 Val-de-Marne
• 95 Val-d'Oise

How postal codes work in Ile-de-France

French postal codes are five digits long, written as a single block with no space (for example, 91150). The code reads from left to right, moving from the département down to the local delivery area.

The first two digits identify the département. In Ile-de-France, every postal code begins with one of these two-digit prefixes: 75, 77, 78, 91, 92, 93, 94 and 95.

The remaining three digits narrow the code down within the département. They identify the delivering post office or commune, and in larger towns a specific delivery zone; they do not reproduce the commune's official INSEE code, even where the two look similar.

Paris uses a distinctive pattern. Its arrondissements are numbered in sequence, from 75001 for the 1st arrondissement through 75020 for the 20th, so the last two digits of a Paris code give the arrondissement directly.

Some codes are reserved for CEDEX (Courrier d'Entreprise à Distribution EXceptionnelle) service. A CEDEX code is assigned to a business, administration, or other recipient that receives high volumes of mail, and it routes post through a dedicated handling arrangement rather than a standard geographic round. CEDEX appears after the town name in the address, sometimes with a number identifying the specific account.

Addressing format

A correctly formatted address in Ile-de-France places the postal code before the town name, on the same line, with the town name in capital letters. For example:

Recipient name
Street and number
91150 ABBEVILLE-LA-RIVIERE

The postal code and town share the final line, postal code first, town in uppercase. A CEDEX designation, where it applies, is added after the town name.