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