Osowo Nowe was formerly part of the German Empire. In the German Empire, the place was called Ossen.
The place is now called Osowo Stare and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ossowo | German Empire | Kosten | before the Versailles Treaty |
| Osowo Nowe | Poland | Kościan | after the Versailles Treaty |
| Osowo Stare, Dwór | Poland | Kościan | after the Versailles Treaty |
| Ossen | German Empire | Gostingen | 1939 |
| Osowo | Poland | Gostyń | 1945 |
| Osowo Nowe | Poland | Leszno | 1992 |
| Osowo Stare | Poland | Leszno | 1992 |