Mielno was formerly part of the German Empire. In the German Empire, the place was called Mellin.
The place is now called Mielno and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Mellin, Adlig | German Empire | Stolp | 1914 |
| Mellin, Königlich | German Empire | Stolp | 1914 |
| Mellin | German Empire | Stolp | 1939 |
| Mielno | Under Polish administration | Słupsk | 1945 |
| Mielno | Poland | Słupsk | 1992 |