Napoleonsinsel was formerly part of the German Empire. In the German Empire, the place was called Napoleonsinsel (Mülhausen-Napoleonsi.).
The place is now called Île Napoléon and belongs to France.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Napoleonsinsel | German Empire | Mülhausen | before the Versailles Treaty |
| Île Napoléon | France | Haut-Rhin | after the Versailles Treaty |
| Napoleonsinsel (Mülhausen-Napoleonsi.) | German Empire | Mülhausen (St.Kr.) | 1940 |
| Île Napoléon | France | Haut-Rhin | 1945 |
| Île Napoléon | France | Haut-Rhin | 1993 |