Jardęga was formerly part of the German Empire. In the German Empire, the place was called Gardenga.
The place is now called Jardęga and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Jardenga | German Empire | Graudenz | before the Versailles Treaty |
| Jardęga | Poland | Grudziądz | after the Versailles Treaty |
| Gardenga | German Empire | Graudenz | 1939 |
| Jardęga | Poland | Grudziądz | 1945 |
| Jardęga | Poland | Toruń | 1992 |