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