Biadaczów was formerly part of the German Empire. In the German Empire, the place was called Klagenau.
The place is now called Biadaczów and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Biadaczow | German Empire | Cosel | 1936 |
| Klagenau | German Empire | Cosel | 1939 |
| Biadaczów | Under Polish administration | Koźle | 1945 |
| Biadaczów | Poland | Opole | 1992 |