Dłużek * was formerly part of the German Empire. In the German Empire, the place was called Hartigswalde OF. und Fh..
The place is now called Dłużek * and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Hartigswalde OF. und Fh. | German Empire | Neidenburg | 1939 |
| Dłużyca | Under Polish administration | Nidzica | 1945 |
| Dłużek * | Poland | Olsztyn | 1992 |