Ostrau was formerly part of the German Empire. In the German Empire, the place was called Ostrau.
The place is now called Ostrov and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ostrau | Austro-Hungary | Tachau | before the Treaty of Saint-Germain |
| Ostrov | Austro-Hungary | Tachau | before the Treaty of Saint-Germain |
| Ostrov | Czechoslovakia | Tachov | after the Treaty of Saint-Germain |
| Ostrau | Czechoslovakia | Tachov | after the Treaty of Saint-Germain |
| Ostrau | German Empire | Tachau | 1938 |
| Ostrov | Czechoslovakia | Tachov | 1945 |
| Ostrov | Czechoslovakia | Tachov | 1992 |
| Ostrov | Czech Republic | Tachov | 1993 |