Polanka was formerly part of the German Empire. In the German Empire, the place was called Neu Haidau.
The place is now called Polanka and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Neu Haidau | German Empire | Bunzlau | 1939 |
| Polanka | Under Polish administration | Bolesławiec | 1945 |
| Polanka | Poland | Legnica | 1992 |