Słosinko was formerly part of the German Empire. In the German Empire, the place was called Reinfeld-Hammer.
The place is now called Słosinko and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Reinfeld b. Rummelsburg | German Empire | Rummelsburg i.Pom. | 1914 |
| Reinfeld-Hammer | German Empire | Rummelsburg i.Pom. | 1939 |
| Słosinko | Under Polish administration | Miastko | 1945 |
| Słosinko | Poland | Słupsk | 1992 |