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