Slavsk was formerly part of the German Empire. In the German Empire, the place was called Heinrichswalde.
The place is now called Slavsk and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Heinrichswalde | German Empire | Elchniederung | 1939 |
| Hajnrihsvalˈde | Under Soviet administration | Kaliningrad | 1945 |
| Slavsk | Russian Federation | Slavsk | 1992 |