Posiłek was formerly part of the German Empire. In the German Empire, the place was called Rasten.
The place is now called Posiłek and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Poschillek | German Empire | Neustadt O.S. | 1936 |
| Rasten | German Empire | Neustadt O.S. | 1939 |
| Posiłek | Under Polish administration | Prudnik | 1945 |
| Posiłek | Poland | Opole | 1992 |