The French Postal Code System has a structure that varies according to the different departments. In Paris, there are twenty ZIP Codes. Each zip code corresponds to a specific neighborhood of the city.
There are also several smaller towns and villages that share the same postcode. Some of these include Le Fresne-sur-Loire, Herin, and Champagne-Ardenne.
The postal codes in France are five digits in length. The first two digits are department numbers. These are used to delimit the metropolitan districts in France.
The remaining three digits identify the local post office. If there is a larger post office, then an individual postcode is given. For example, the eighth arrondissement of Lyon, France has two postcodes. This is similar to other countries' systems.
Paris, France, is divided into 20 arrondissements. Aside from that, there are several cities that have different zip codes. For example, Amiens, Somme, is prefecture and is a part of the 8th arrondissement.
Marseille, France, has two zip codes. Unlike other cities, the third digit is used to identify the overseas collectivity. Another exception is that the postal code for Monaco is a two-digit code.
Corsica, France, is divided into two departments. Although there are still a few arrondissements in Corsica, the postal codes are still numbered by number. They begin with a "20" and end with a "98".
Overseas territories, including Martinique and Guadeloupe, are represented by three-digit codes. However, the destination country is different from that of the overseas territory.