Kozin was formerly part of the German Empire. In the German Empire, the place was called Eiserbruch.
The place is now called Kozin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Eiserbruch | German Empire | Soldin | 1939 |
| Kozin | Under Polish administration | Myślibórz | 1945 |
| Kozin | Poland | Gorzów | 1992 |