Mielno was formerly part of the German Empire. In the German Empire, the place was called Mellendorf.
The place is now called Mielno and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Mellendorf | German Empire | Rothenburg (Ob. Lausitz) | 1939 |
| Mielno | Under Polish administration | Żary | 1945 |
| Mielno | Poland | Zielona Góra | 1992 |