Polánka was formerly part of the German Empire. In the German Empire, the place was called Polánka.
The place is now called Polánka and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Polanka | Austro-Hungary | Blatna | before the Treaty of Saint-Germain |
| Polánka | Austro-Hungary | Blatna | before the Treaty of Saint-Germain |
| Polánka | Czechoslovakia | Blatná | after the Treaty of Saint-Germain |
| Polanka | German Empire | Blatna | 1939 |
| Polánka | German Empire | Blatna | 1939 |
| Polánka | Czechoslovakia | Blatná | 1945 |
| Polánka | Czechoslovakia | Plzeň-jih | 1992 |
| Polánka | Czech Republic | Plzeň-jih | 1993 |