Île-de-France. And it depends on the administrative prefecture of Bobigny. The postal code for this municipality is 93600.
This city is near Paris. It is in the Paris region known as Petite Couronne.
Under the jurisdiction of the Seine-Saint-Denis prefecture
Seine-Saint-Denis has three districts: Bobigny, Le Raincy, and Saint-Denis. The Raincy district encompasses 22 municipalities, including Aulnay-sous-Bois. However, for residence permits, people go to the prefecture in Bobigny.

Which prefecture does Aulnay-sous-Bois depend on?
Aulnay-sous-Bois is managed by the Seine-Saint-Denis prefecture. This takes place in Bobigny. There, applications to live in the city are processed.

The sub-prefecture of Raincy, nearby, also helps. But now, almost everything is done online. Otherwise, you go to a tobacco shop.
| Service | Current situation |
|---|---|
| Sale of tax stamps | Not available at the Raincy sub-prefecture |
| Driving license and registration counters | Closed permanently since September 1, 2017 |
| Digital Access Points | Closed at the Raincy sub-prefecture, available by appointment at the Bobigny prefecture |
| Residence permits and naturalization | Processed by the Seine-Saint-Denis prefecture in Bobigny |
In summary, in Aulnay-sous-Bois, you go to Bobigny for certain procedures. Even though we depend somewhat on Raincy, this is how it works.
Decentralized State services in Aulnay-sous-Bois
The Raincy sub-prefecture is located at 57 Avenue Thiers, in Le Raincy. It represents the State for 22 municipalities, including Aulnay-sous-Bois. However, for residence permits and naturalization, you must go to the Seine-Saint-Denis prefecture in Bobigny.
The Raincy sub-prefecture no longer sells tax stamps. The counters for driving licenses and registration have been closed since 2017. Now, these procedures are done online. This shows that State services are adapting to modern life.
Despite the closures, the Raincy sub-prefecture is important for Aulnay-sous-Bois. It allows local elected officials to be close to State representatives. It also helps coordinate public policies, especially for employment and social inclusion.

