Šoštanj was formerly part of the German Empire. In the German Empire, the place was called Schönstein.
The place is now called Šoštanj and belongs to Slovenia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Schönstein | Austro-Hungary | Windischgraz/Slovenji Gradec | before the Treaty of Saint-Germain |
| Šoštanj | Austro-Hungary | Windischgraz/Slovenji Gradec | before the Treaty of Saint-Germain |
| Šoštanj | Yugoslavia | Slovenj Gradec | after the Treaty of Saint-Germain |
| Schönstein | German Empire | Cilli | 1941 |
| Šoštanj | Yugoslavia | Celje | 1945 |
| Šoštanj | Yugoslavia | Socialistična rep. Slovenija | 1992 |
| Šoštanj | Slovenia | Slowenien | 1991 |