Opotschna was formerly part of the German Empire. In the German Empire, the place was called Opočno.
The place is now called Opočno and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Opotschna | Austro-Hungary | Saaz | before the Treaty of Saint-Germain |
| Opočno | Austro-Hungary | Saaz | before the Treaty of Saint-Germain |
| Opočno | Czechoslovakia | Žatec | after the Treaty of Saint-Germain |
| Opotschna | German Empire | Laun | 1939 |
| Opočno | German Empire | Laun | 1939 |
| Opočno | Czechoslovakia | Louny | 1945 |
| Opočno | Czechoslovakia | Louny | 1992 |
| Opočno | Czech Republic | Louny | 1993 |