Płoszczynka was formerly part of the German Empire. In the German Empire, the place was called Neu Flachenseiffen.
The place is now called Płoszczynka and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Neu Flachenseiffen | German Empire | Löwenberg i. Schles. | 1939 |
| Płoszczynka | Under Polish administration | Lwówek Śląski | 1945 |
| Płoszczynka | Poland | Jelenia Góra | 1992 |