Zielecin was formerly part of the German Empire. In the German Empire, the place was called Zielęcin.
The place is now called Zielęcin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Zielecin | Russian Empire | Novoradomsk | 1914 |
| Zielęcin | Poland | Radomsko | 1921 |
| Zielęcin | German Empire | Welungen | 1939 |
| Zielęcin | Poland | Pajęczno | 1945 |
| Zielęcin | Poland | Piotrków | 1992 |