Ślązacy was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Slazacy and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| NN (Ślązacy) | Austro-Hungary | Saybusch/Żywiec | before the Treaty of Saint-Germain |
| Ślązacy | Poland | Żywiec | after the Treaty of Saint-Germain |
| NN | German Empire | Saybusch | 1939 |
| NN | Poland | Żywiec | 1945 |
| Slazacy | Poland | Bielsko | 1992 |