Osowo was formerly part of the German Empire. In the German Empire, the place was called Wussow.
The place is now called Osowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Wussow | German Empire | Lauenburg i.Pom. | 1939 |
| Osowo (Lęborskie) | Under Polish administration | Lębork | 1945 |
| Osowo | Poland | Słupsk | 1992 |