Osówko was formerly part of the German Empire. In the German Empire, the place was called Ostenhof.
The place is now called Osówko and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ossowken | German Empire | Graudenz | before the Versailles Treaty |
| Osówko | Poland | Grudziądz | after the Versailles Treaty |
| Ostenhof | German Empire | Graudenz | 1939 |
| Osówko | Poland | Iława | 1945 |
| Osówko | Poland | Toruń | 1992 |