Leszno was formerly part of the German Empire. In the German Empire, the place was called Leschnau.
The place is now called Leszno and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Groß Leschno | German Empire | Allenstein | 1938 |
| Leschnau | German Empire | Allenstein | 1939 |
| Leszno | Under Polish administration | Olsztyn | 1945 |
| Leszno | Poland | Olsztyn | 1992 |