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