Gaszyn was formerly part of the German Empire. In the German Empire, the place was called Gaschen.
The place is now called Gaszyn and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Gaszyn | Russian Empire | Veljunˈ | 1914 |
| Gaszyn | Poland | Wieluń | 1921 |
| Gaschen | German Empire | Welungen | 1939 |
| Gaszyn A | Poland | Wieluń | 1945 |
| Gaszyn B | Poland | Wieluń | 1945 |
| Gaszyn | Poland | Sieradz | 1992 |