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 Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rostok | Austro-Hungary | Königinhof a. d. Elbe | before the Treaty of Saint-Germain |
| Roztoky | Austro-Hungary | Königinhof a. d. Elbe | before the Treaty of Saint-Germain |
| Roztoky | Czechoslovakia | Dvůr Králové nad Labem | after the Treaty of Saint-Germain |
| Rostok | German Empire | Königinhof an der Elbe | 1939 |
| Roztoky | German Empire | Königinhof an der Elbe | 1939 |
| Roztoky | Czechoslovakia | Dvůr Králové nad Labem | 1945 |
| Roztoky | Czechoslovakia | Východní Čechy | 1992 |