Plaškiai was formerly part of the German Empire. In the German Empire, the place was called Plaschken.
The place is now called Plaškiai and belongs to Lithuania.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Plaschken | German Empire | Tilsit | before the Versailles Treaty |
| Plaškiai | Lithuania | Pajėgiai | after the Versailles Treaty |
| Plaschken | German Empire | Heydekrug | 1939 |
| Plaškiai | Soviet Union | Pagėgiai/Pagegjaj | 1945 |
| Plaškjaj | Soviet Union | Pagėgiai/Pagegjaj | 1945 |
| Plaškiai | Lithuania | Šilutė | 1992 |