Siaszyce was formerly part of the German Empire. In the German Empire, the place was called Siąszyce.
The place is now called Siąszyce and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Siaszyce | Russian Empire | Konin | 1914 |
| Siąszyce | Poland | Konin | 1921 |
| Siąszyce | German Empire | Konin | 1939 |
| Siąszyce | Poland | Konin | 1945 |
| Siąszyce | Poland | Konin | 1992 |