Rzadkowo was formerly part of the German Empire. In the German Empire, the place was called Hügelhausen.
The place is now called Rzadkowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rzadkowo | German Empire | Kolmar i. Posen | before the Versailles Treaty |
| Rzadkowo | Poland | Chodzież | after the Versailles Treaty |
| Hügelhausen | German Empire | Kolmar (Wartheland) | 1939 |
| Rzadkowo | Poland | Chodzież | 1945 |
| Rzadkowo | Poland | Piła | 1992 |