Rajsko was formerly part of the German Empire. In the German Empire, the place was called Hochacker.
The place is now called Rajsko and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rajsko | Russian Empire | Kališ | 1914 |
| Rajsko | Poland | Kalisz | 1921 |
| Rajsko | German Empire | Kalisch | 1939 |
| Hohenacker | German Empire | Kalisch | 1939 |
| Hochacker | German Empire | Kalisch | 1939 |
| Rajsko | Poland | Kalisz | 1945 |
| Rajsko | Poland | Kalisz | 1992 |