Koźmin was formerly part of the German Empire. In the German Empire, the place was called Koschmin.
The place is now called Koźmin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Koschmin | German Empire | Berent | before the Versailles Treaty |
| Koźmin | Poland | Kościerzyna | after the Versailles Treaty |
| Koschmin | German Empire | Berent (Westpr.) | 1939 |
| Koźmin | Poland | Kościerzyna | 1945 |
| Koźmin | Poland | Gdańsk | 1992 |