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