Kobylin was formerly part of the German Empire. In the German Empire, the place was called Koppelstädt.
The place is now called Kobylin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kobylin | German Empire | Krotoschin | before the Versailles Treaty |
| Kobylin | Poland | Krotoszyn | after the Versailles Treaty |
| Kobylin | German Empire | Krotoschin | 1939 |
| Koppelstädt | German Empire | Krotoschin | 1939 |
| Kobylin | Poland | Krotoszyn | 1945 |
| Kobylin | Poland | Leszno | 1992 |