Sak was formerly part of the German Empire. In the German Empire, the place was called Saky.
The place is now called Saky and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sak | Austro-Hungary | Schlan | before the Treaty of Saint-Germain |
| Saky | Austro-Hungary | Schlan | before the Treaty of Saint-Germain |
| Saky | Czechoslovakia | Slaný | after the Treaty of Saint-Germain |
| Sak | German Empire | Schlan | 1939 |
| Saky | German Empire | Schlan | 1939 |
| Saky | Czechoslovakia | Slaný | 1945 |
| Saky | Czechoslovakia | Kladno | 1992 |
| Saky | Czech Republic | Kladno | 1993 |