Siedlec was formerly part of the German Empire. In the German Empire, the place was called Scheltz.
The place is now called Siedlec and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Siedlec (Bz. Posen) | German Empire | Bomst | before the Versailles Treaty |
| Siedlec | Poland | Wolsztyn | after the Versailles Treaty |
| Siedlec | German Empire | Wollstein | 1939 |
| Kirchdorf | German Empire | Wollstein | 1939 |
| Scheltz | German Empire | Wollstein | 1939 |
| Siedlec | Poland | Wolsztyn | 1945 |
| Siedlec | Poland | Zielona Góra | 1992 |