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