Sosnowietz was formerly part of the German Empire. In the German Empire, the place was called Sosnowietz.
The place is now called Sosnowiec (Mysłowice-Sosnowiec) and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sosnowietz | German Empire | Pleß | before the Versailles Treaty |
| Sosnowiec | Poland | Pszczyna | after the Versailles Treaty |
| Sosnowietz | German Empire | Pleß | 1939 |
| Sosnowiec | Poland | Pszczyna | 1945 |
| Sosnowiec (Mysłowice-Sosnowiec) | Poland | Katowice | 1992 |