Grójec was formerly part of the German Empire. In the German Empire, the place was called Grojetz.
The place is now called Grójec and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Grojec | Austro-Hungary | Auschwitz/Oświęcim | before the Treaty of Saint-Germain |
| Grójec | Poland | Oświęcim | after the Treaty of Saint-Germain |
| Grojetz | German Empire | Bielitz | 1939 |
| Grójec | Poland | Oświęcim | 1945 |
| Grójec | Poland | Bielsko | 1992 |