Sankt Cosman was formerly part of the German Empire. In the German Empire, the place was called Sankt Kosman.
The place is now called Saint-Cosme and belongs to France.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sankt Cosman | German Empire | Altkirch | before the Versailles Treaty |
| Saint-Côsme | France | Haut-Rhin | after the Versailles Treaty |
| Sankt Kosman | German Empire | Altkirch | 1940 |
| Saint-Cosme | France | Haut-Rhin | 1945 |
| Saint-Cosme | France | Haut-Rhin | 1993 |