Milęcin was formerly part of the German Empire. In the German Empire, the place was called Altmühle.
The place is now called Milęcin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Altmühle | German Empire | Namslau | 1939 |
| Milęcin | Under Polish administration | Namysłów | 1945 |
| Milęcin | Poland | Opole | 1992 |