Roztoky was formerly part of the German Empire. In the German Empire, the place was called Roztoky.
The place is now called Roztoky and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rostok | Austro-Hungary | Smichow | before the Treaty of Saint-Germain |
| Roztoky | Austro-Hungary | Smichow | before the Treaty of Saint-Germain |
| Roztoky | Czechoslovakia | Smíchov | after the Treaty of Saint-Germain |
| Rostok | German Empire | Prag | 1939 |
| Roztoky | German Empire | Prag | 1939 |
| Roztoky | Czechoslovakia | Praha-západ | 1945 |
| Roztoky | Czechoslovakia | Praha-západ | 1992 |
| Roztoky | Czech Republic | Praha-západ | 1993 |