Osiek was formerly part of the German Empire. In the German Empire, the place was called Ossig.
The place is now called Osiek and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ossig | German Empire | Lüben | 1939 |
| Osiek | Under Polish administration | Lubin | 1945 |
| Osiek | Poland | Legnica | 1992 |