Zielonka was formerly part of the German Empire. In the German Empire, the place was called Ulrichssee.
The place is now called Zielonka and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Zielonken | German Empire | Ortelsburg | 1900 |
| Seelonken | German Empire | Ortelsburg | 1912 |
| Ulrichssee | German Empire | Ortelsburg | 1939 |
| Zielonka | Under Polish administration | Szczytno | 1945 |
| Zielonka | Poland | Olsztyn | 1992 |