Lesnik was formerly part of the German Empire. In the German Empire, the place was called Leśnik.
The place is now called Leśnik and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Lesnik | Russian Empire | Turek | 1914 |
| Leśnik | Poland | Turek | 1921 |
| Leśnik | German Empire | Turek | 1939 |
| Leśnik | Poland | Poddębice | 1945 |
| Leśnik | Poland | Sieradz | 1992 |